The theory and ingredients for my ceramic shell slurry

Рет қаралды 16,995

Күн бұрын

Before we start mixing our ceramic shell slurry i want to explain my approach and sources, but I also want to discuss the ingredients that i prefer to use.
kzfaq.info...)
0:00 intro
0:48 my slurry history
2:41 where i get my materials
6:29 silica binder
10:11 silica flour
12:38 suspension agent
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SLURRY
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Materials:
Adbond II - colloidal binder
RP-1 - fused silica flour
Bentonite - 325 mesh
Foundry Wax and Ceramic Shell: REMET
www.remet.com/us/remetproduct...
You will need to call 1-315-797-8700 ask for Bob Wartella (rep for small scale foundries and casters. Tell him Lunarburn Studio sent you.
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Timeline Achivements
May 2, 2020 first content video
July 23, 2020 100 subs
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Disclosures: All opinions are my own. Sponsors are acknowledged. Some links in the description are affiliate links that if you click on one of the product links, I’ll receive a commission at no additional cost to you. As an Amazon Associate I earn a small commission from qualifying purchases.
***DISCLAIMER****
This video is for entertainment and educational purposes only. Most if not all sculpture materials and processes are inherently dangerous. You must always use precaution and wear the proper protective gear.
These videos are not intended for children.
By reading this statement you acknowledge that there are inherent and significant elements of risk foreseen & unforeseen associated with foundry and metalwork, including being close to potentially hazardous and dangerous materials.
With full knowledge and acknowledgment of any potential risks, You hereby release and discharge Lunarburn Studio LLC and the owners from any and all liability for personal injury, property damage, or wrongful death that may result from replicating any activity in this/these videos. You agree that under no circumstances will you, your heirs, your estate, or your personal representative present any claim against Lunarburn Studio LLC and its owners.

Пікірлер: 120

@archermayo9055 2 жыл бұрын

I am so appreciative that you took the time to make these videos and share so much knowledge and experience. It’s a precious gift.

@LunarburnStudio 2 жыл бұрын

You are so welcome! I love teaching and a-lot of the reason I know what I do is that people openly shared the information with me when I was beginning. What goes around comes around. Let me know if you have any questions.

@michaelburton8024 2 жыл бұрын

I love the time you take to offer use full list of everything you use in the video. Much appreciated

@LunarburnStudio 2 жыл бұрын

Glad it was helpful! Let me know if you have any questions.

@andycap1223 2 жыл бұрын

Wow! I really appreciated that. You seemed to share all your (considerable!) knowledge on the topic in both a lucid & generous way. Surely, your "ceramics prof" dad would be very proud of you, indeed!

@LunarburnStudio 2 жыл бұрын

He is indeed. Glad your are finding my videos helpful.

@JB-mw5rg 3 жыл бұрын

Thanks again Eric, looking forward to the next video!

@lazaroybarra5998 2 жыл бұрын

Good job man ! Appreciate the info , I went to college ,took 2 years of ceramic she'll and you added to my knowledge of ceramic shell process. "One man show", I want to do that as well! I did watch most of you youtube shows

@LunarburnStudio 2 жыл бұрын

That is awesome! Feel free to to ask questions. Happy to help.

@shadowcrusader2283 6 ай бұрын

Almost 60 and just starting down this road of Casting, don't get me wrong I've been an artist / Mechanic/ Blacksmith for 40 yrs. Never to old to learn Thanks for doing what you do:)

@LunarburnStudio 6 ай бұрын

Excellent. Let me know if you have any questions.

@Squishyharibo 3 жыл бұрын

Weird how things come back around... I was looking for a recipe for ceramic shell, found this video and realised I met you at Sloss 2017 and still have one of your stickers stuck to my pc! Thanks from the UK, your videos are gold!

@LunarburnStudio 3 жыл бұрын

Cool, glad to hear you are finding the videos helpful, and great to reconnect. Let me know if you have any questions

@gordon6029 3 жыл бұрын

Really appreciate these videos. Might try this small scale for fun.

@dremlin 3 жыл бұрын

This is very informative and comprehensive, searched for the insight on ceramic shell casting for some time. Thank you for your video!

@LunarburnStudio 3 жыл бұрын

I am doing my best to give the community solid info. But let me know if you have any questions.

@dremlin 3 жыл бұрын

@@LunarburnStudio I definitely will, after I lay my hands on all the materials I need. Thank you!

@collinjerome8047 3 жыл бұрын

a trick: watch movies at Flixzone. Been using them for watching all kinds of movies during the lockdown.

@kysonpablo6733 3 жыл бұрын

@Collin Jerome yea, been using flixzone for months myself :)

@8MADJACK 7 ай бұрын

So glad I found you, great information, done sand castings, want to try this

@Lamprolign 6 ай бұрын

Great video! Thank you for sharing your experiences!

@maritzaosorio3212 2 жыл бұрын

Very interesting, Excellent video. I work for a Long Island manufacturing and we do all kind of Metal, Bronze, Brass etc. and I am learning in how to do it. Your explanation is great. Thanks you

@LunarburnStudio 2 жыл бұрын

Glad I could be of help. Let me know if you have any questions.

@ScullyPopASMR 3 жыл бұрын

This is my first ceramic channel. I know nothing about this. Very cool.

@LunarburnStudio 3 жыл бұрын

Let me know if you have any questions.

@notyouraveragegoldenpotato 4 ай бұрын

I saw a video of a DIY Electric Arc Furnace yesterday, made and tested it today. Cost me 20 bucks 30 minutes time and works a treat. Aiming to do some lost wax or lost PLA fdm casting. Been researching slurry mixes and options. Cheaper the better. Figured I'd tackle that tomorrow now that I have a working EAF

@LunarburnStudio 3 ай бұрын

That is awesome! nice work on the new furnace, I have not tried that yet. There a number of way to do lost-wax casting on the cheap with a plaster based investment. Unfortunately ceramic shell can be pricey because of the setup and equipment traditionally required. But if your starting out, its best to use "Just-Dip" or "Suspenda-Slurry". I know it seems pricey $200 per 5 gal, but its ready to go. and its enough material to get 15-20 shells (small to medium) in size.

@Jose_Angel7 3 жыл бұрын

man, I'm learning to sculpt in zbrush, then I would like to print my pieces in 3d and then do my little foundry workshop, printing the pieces in wax and then casting them ... THANK YOU for sharing your knowledge, it has been very difficult for me find on this topic, I hope you keep sharing more, you have all my likes! Im from Spain!

@LunarburnStudio 3 жыл бұрын

Thanks for you kind words. Working on more videos but busy in the foundry.

@wantafastz28 3 жыл бұрын

Very informative. I ruled this option out because I thought it was too pricey.... but now, maybe not?

@nickjones3036 Жыл бұрын

Thank you for sharing this.

@TheLostFoundry 3 жыл бұрын

Thank you for sharing, great work.

@LunarburnStudio 3 жыл бұрын

Thanks, I noticed that you are using Remet's Just Dip. I have played with that a little bit, doing a comparison vid with suspendaslurry now. Let me know if you have any questions.

@TheLostFoundry 3 жыл бұрын

@@LunarburnStudio thank you, yes. I'm very keen to know the different and benefits of both. I am for ever wanting to learn more and your vids are allowing this. Be great to come visit one day 😀

@LunarburnStudio 3 жыл бұрын

@@TheLostFoundry Yes indeed, would be great to cross paths one day!

@TheLostFoundry 3 жыл бұрын

@@LunarburnStudio when were aloud to travle ill come on over

@michaelomalley6726 10 ай бұрын

Thanks so much great info.

@LunarburnStudio 10 ай бұрын

Glad it was helpful! Let me know if you have any questions.

@agustinruiz7129 3 жыл бұрын

Thank You!

@scottjensen7555 2 жыл бұрын

I'm taking up bronze casting as a hobby and I really appreciate the extensive information your videos provide. I particularly like the shell casting process, as my main interest are small human figures I produce and 3-D print, approximately 4 to 7 inches high (until I get a larger kiln). The ready made shell slurries are quite pricy, so I checked out the Remit web site for raw materials as you suggested, but it's not a typical shopping site like Amazon or eBay, so I'm made email enquiry to them for help. Is there a specific link I can go to, to find a shopping list?

@LunarburnStudio 2 жыл бұрын

Even though the pre-mades seem a little prices they are worth i it for the connivence when just starting out. given what you want to cast you will be able to do 20 or so castings. ( thats a a few figures per tree). But if you want to mix your own you will want 50 lbs of adbond colloidal, 2 55lbs bags of RP1 (fused silica flour) and a half lbs of bentonite. YOu will also need 2 bags of fused silica 30/50 and 1 bag fused silica 50/100. as your stuccos/sands. You will need these for both the ready-made slurry and/or your home made slurry.

@NaF_Art_Studio 3 жыл бұрын

great content, advices for starting up for biggeners and if starting small scale and planning to grow, would it better to get like a small furnace and other equip or use standard size stuff ( pro ) stuff and it wouldnt be much difference? and i'd love to seee more hands on content. thanks again

@LunarburnStudio 3 жыл бұрын

Depends, if you are committed to starting a full scale foundry then start with the size you think you will need. If you have never done foundry then you might want to start small to get a feel for it. The foundry process as a whole is a lot of work and you should know before hand what you are getting your self into.

@adminopenshop5608 2 жыл бұрын

Hi! Great videos! I really appreciate your mastery of these techniques. I have been watching all of the videos and they are excellent. I'm typically American based but have been in Australia during the pandemic, I've been doing alot of bronze casting with sand molds down here. I am trying to cross into lost wax molds. It is very difficult to find the appropriate materials down here as they need to be shipped in large quantities down under. I'm having a hard time locating colloidal silica. I have however easily found silica flour and bentonite. My question is - what do you think about sodium silicate as a substitute for colloidal silca? I've been researching water glass lost molds, and sodium silicate is easily found at ceramics shops. Can you recommend proportions to silica flour if it is useable? Thank you and keep filming!

@LunarburnStudio 2 жыл бұрын

I apologize for the delayed response. Interesting question. I have only used sodium silicate for sand molds. Not sure it will hold up to the typical temp of the burnout. and not sure how stable it will be in regards to expansion and contraction. But with that said give it a try. "Water glass" or sodium silicate has been around for along time, 1640? I believe it a component in colloidal silica that is scientifically transformed. More than just mixing it with other ingredients to make colloidal silica.

@eelcohoogendoorn8044 2 жыл бұрын

One interesting material ive ran into; if you coat a pattern in sodium/potassium silicate, then put it in the freezer, and once frozen, put it into a concentrated solution of calcium chloride stored in said freezer. The calcium chloride will melt the water in the surface of the frozen material; and will immediately cement the silica in place as very insoluble and refractory calcium silicates. Depending on the water content of the water glass, you get a glassy white micro-foam like structure that captures all surface detail, is super breathable, and that has pretty decent mechanical integrity, holds up to a blowtorch for quite a while, and I suppose most importantly has almost perfect dimensional stability; the thawing-front does not seem to introduce any shrinkage stresses. Mind ive only tried this on small pieces, but ive got no reason to believe it wouldnt scale well to bigger pieces. No idea how it would hold up to the rigors of extended burnout cycles though; ive only used it to make simple open molds and cast zinc into it. If you wanted to do a big complex piece this way I guess youd need to print an exterior mold to pour the waterglass in, then freeze it, remove the outer mold, and carry on with the CaCl. Kindof annoying, though I doubt successive dipping would work on top of a calcium silicate glass already drenched in other salts.. Perhaps a process like this as a single surface layer, combined with a sodium-silicate-sand coarser backing layer could work? On paper sodium silicate shouldnt melt too quickly at typical burnout temperatures; though I suppose there is a reason you never see anyone do lost-pla-sand-sodium-silicate? Anyway, yeah water glass is cool stuff, play around with it, guaranteed to have fun if nothing else :)

@pauls5745 3 жыл бұрын

nice thorough vid but Remet likes to sell bulk quantities. for small-scale hobbyists, there's other sources that you can buy a pound or 5 of each component, a good start for search is ceramic craft hobby sites, they have the same materials whereas Remet is an industrial supplier. I'd like to try the shellac dip or alcohol/shellac you mentioned

@LunarburnStudio 3 жыл бұрын

I am glad you found something in the my video helpful. You are right if you only need a pound of this or a pound of that, Remet might not be the best choice, but they are happy to work with small scale foundries and sell single bags.

@jessbakerjess 3 ай бұрын

great informative video Eric,thanks for making it! with out me digging around for other suppliers,would you say REMET are competetively priced too?

@LunarburnStudio 3 ай бұрын

REMET is competitive price wise but not sure if it is the cheapest if that is what you are looking for. I find their products and customer service to be super consistant though.

@carlosmicheltorresmercado1541 Жыл бұрын

Meu irmão obrigado por compartilhar teu sabiduria em fundição não sabe como me está ajudando, embora aqui em Brasil és muito carente em matéria prima para fundição em comcha mais um dia chego, .👏👏👏👏🤝

@LunarburnStudio Жыл бұрын

Fico feliz que esteja achando meus vídeos úteis. Eu gostaria de poder ajudar mais a encontrar materiais alternativos onde você mora. Tente encontrar indústrias locais ao seu redor. Eles podem ter sugestões. Boa sorte.

@numbskullskills 2 ай бұрын

thank you for your knowledge on this subject, iv done sand casting, yrs ago, i want to try this i have a couple questions for you on your batch you talked of water how much of that would i maybe need to start with. iv looked for the products and found them but who do you get yours from. ill be making half what you do so i can just buy a 5gal bucket instead of 50gal. again thank you for passing this knowledge on.

@LunarburnStudio 2 ай бұрын

I get my materials from Remet.com When you say water, you mean colloidal correct? With the AdBond II my mix is 1 part colloidal 2 parts fused silica flour.

@numbskullskills 2 ай бұрын

@@LunarburnStudio ok 1/2 the water you talked about was to freshen it. sorry guess i should clean my ears, at least pick the grass thats growin. thanks wish me luck

@mevk1 Жыл бұрын

Really would ike to out try these thinner versatile slurry molds, but on more of a micro level - such as mixing up a cup size batch to mold, say a heavier-type sterling silver bracelet. Would realy love to know your thoughts on this. Also, if you can, please recommend a formula for say 1 or 2 pounds of slurry, with the ingrediants preferably being sourced from local hardware, drug, auto stores, etc. Thank you for sharing your weath of knowledge to the masses -we're all so appreciative!

@LunarburnStudio Жыл бұрын

Ceramic shell is rough on precious metals like gold and silver. The shell is tough to get off which is why i typically need to use a sandblaster which will just destroy any detail captured in the softer metals. As for a cheaper or more accessable material list, I do not know of any suitable replacements for the ingredients. Remember, Ceramic shell is an industrial process, and its only in the last decade that it has become viable for the small foundry's.

@beil3537 3 жыл бұрын

Hi Eric, thanks so much for your generosity in sharing your knowledge - these are awesome video's and have learnt a lot about a process I have only just become privy to. I am interested in applying this technique to glass casting. Do you have any experience with this and/or words of wisdom on the subject would be greatly appreciated! Cheers from Brisbane ;)

@LunarburnStudio 3 жыл бұрын

I have been experimenting with kiln casting glass with ceramic shell mold for some time and have little to no positive results. Fundamentally the glass and shell are too close in composition and just fuse together. I have tried a variety of washes (graphite, zircon, alumina, etc) and they sort of work in places but mostly just obscure any detail. The other major challenge is to get the shell off. Any hammering and the glass brakes. Sand blasting is better, but it can be difficult to tell when the shell end the the glass starts. I keep thinking that there is a way to make it work, so ill keep trying.

@beil3537 3 жыл бұрын

@@LunarburnStudio Thanks for the info. I guess I'll just have to do some experimenting myself... and can always resort to the tried and true gypsum and silica cast - was looking for a way to reduce the waste and shell casting looked like a possible solution. Maybe starting with a couple of layers of this before using these more elaborate concoctions might be all that's needed for easy release?!? I'll let you know if I have any success.

@jaredmallard9986 Ай бұрын

I have watched this a few times trying to learn as much as possible. I have a question though. Could you share your thoughts on how the recipe could be modified to make a suitable mixture for casting into a mold and having the ceramic as the final product rather than casting metal into it?

@LunarburnStudio Ай бұрын

Interesting question. Id say reversae the process. Because the of the nature of the material you wont be ablto to just pour it in solid, it will crack as it dries. Instead try to slush the slurry in and pour out. then pour in a fine grain stucco/sand. Using a blower or airhose dry that layer. once dry repeat to desired thickness. Let me know how it works out.

@djamelkhebab8083 3 жыл бұрын

Hi lunarburn, can i use your lost wax casting process to cast mechanical pieces in aluminium alloy. Thanks

@LunarburnStudio 3 жыл бұрын

Yes

@TroyeWelch 2 жыл бұрын

Hi much bentonite do you find yourself adding and do you use Western (Sodium) or Southern (Calcium)? Thanks for the information! I pour iron (and aluminum), but only in greensand, which obviously has its limitations.

@LunarburnStudio 2 жыл бұрын

Sorry the delayed response. I know i typically buy western but checked my current bag and it doesn't say. As for how much, I add 1/3-1/2 lb per batch. and my batch is 55 lbs colloidal and 110 lbs fused silica flour.

@TroyeWelch 2 жыл бұрын

@@LunarburnStudio thanks!

@tobhomott 3 жыл бұрын

Very interesting. A lot of hobbyist casters who maybe only make a few castings a year and don't have timer controlled mixer setups have had great results using suspendaslurry (making a 5 gallon bucket last a few years), since it is already designed to be easy to remix when it has sat for long periods. Seems very convenient... What is the advantage of customizing your own slurry?

@LunarburnStudio 3 жыл бұрын

I think that Remet's "Just-Dip" and R&R's "Suspendaslurry" are good options. Although, they can be a bit pricey and you still need to buy the stucco's. I am trying to get both those products so I can do some comparison videos. For now Im just showing what I do for my slurry, and maybe provide an option to those who want to tweak their existing ceramic shell systems. Some of the advantages of customizing your own slurry is mainly Cost and the ability to adjust your slurry as needed. I am a bit of a nerd that way, I like to understand and have the ability to adjust my materials and process to best achieve the desired results.

@trontastic 3 жыл бұрын

Also Tobho i'm in the UK and can not get hold of suspendaslurry , so will have to add one more ingredient to my mix to make things stay suspended longer.

@trontastic 3 жыл бұрын

@@LunarburnStudio Thanks so much for your help and dedication to explain slurry and it's problems and how to overcome them. I am at the stage of where i wont need it for a week but my slurry separates out within 2 days. Need to add something to it soon, or stick it on a tumbler if i can make one. Lol.

@LunarburnStudio 3 жыл бұрын

Another option for a suspension is Shellspen www.shellspen.com/ most of the options on the website is set up as kits, but i believe that if you contact them with what your current slurry is they can hook you up with just the additive. I used their product for 5 year when teaching, worked very well.

@LunarburnStudio 3 жыл бұрын

To be fair when I used shellspen it was 25 year ago and at that time you could just buy the suspension chemicals separately and source the rest of your silicas locally. After looking at their site just now, it you can only buy via their "Kits" then it maybe over priced and may not be worth it. But I will take a closer look.

@farhanchoudhre6962 Жыл бұрын

Subscribed your channel Thanks for the information. Can you write up the weight of each product if I need a slurry with total weight 100kg. It will be easy to understand as in our country we have various kinds of packaging bags like 10kg 25kg 50kg. So i can't figure about your calculations of bag

@LunarburnStudio Жыл бұрын

With the enhanced binder I am using "Remet's Adbond II" it is one part binder and two parts silica flour. so roughly 33kg of binder/colloidal to 66kg flour. if you are using a more common grade of colloidal silica the ration to mix is closer to 1 to 3 parts. What type or grade of colloidal are you using?

@sekatorck373 3 жыл бұрын

Hi! Very interesting lessons. I am from Poland. My hobby is brass sand casting. I want to start lost wax and I am happy that i found your channel. I checked on the Remet website that they have shop in Bratislava (Slovakia) do You think i can order materials from them? Can You give us some contact to this company for european viewers too? Or if that will be impossible can You recommend something good and easy to buy in Europe?

@LunarburnStudio 3 жыл бұрын

I can check with my contacts and ask.

@roycarter8575 3 жыл бұрын

Eric, thanks again for sharing your wonderful experiences/knowledge working with wax and the ceramic shell casting process in this video series!!! Question: In your opinion for we small scale casting folks, Is a high HP compressor necessary for removing the shell from cast items? In another words, are you aware of alternative means for removing the shell material in general and specifically from different cast metals. -- aluminum, bronze or iron? My cast works will be small, smooth and initially in aluminum. Roy Carter

@LunarburnStudio 3 жыл бұрын

As always think you for your kind words. Removing the ceramic shell from your castings can be a challenge sometimes, depending the shape and surface texture. A hammer and chisels and picks of different sizes will get you most of the way there, but the more texture you have the more the shell will cling. The use of a sandblaster will certainly make removing the final bits of shell easier so unfortunately an air compressor is needed. But an air compressor is a great investment for any shop. There are a range of tools that will aid your foundry process, such as air hammers and die grinders. One thing to keep in mind is to let your shells/metal cool completely before brake-out. This allows the metal to fully contract/shrink and brake and release from the shell. I have tried using a pressure washer but with limited results.

@LunarburnStudio 3 жыл бұрын

As for aluminum for your first casting, if they are smooth the shell will mostly release pretty clean. One of the characteristics of fused silica shell is that its physical structure changes when you heat it over 1700 F making it softer (soft is relative term) and easier to remove and that temp is easy achieved when casting bronze and iron, but aluminum is poured just shy of that temp. So what i do is I bring the shells up to 1700+ F but then let them cool to more like 1000 f before pouring my aluminum. I will go into more detail in future video that will show in detail how a pre-heat and pour my shells.

@roycarter8575 3 жыл бұрын

@@LunarburnStudio Eric, I have been trying to find alternatives to blasting. I have come upon info from a eastwood.com KZfaq video showing their soda blaster used for cast aluminum shell removal. The reason: abrasives pit aluminum. One tech. person at R&R ceramic shell company suggested boiling as perhaps one alternative means for removing the shell. I just do not know what the minimum horse power would be doable for a compressor. The 5 HP ones are huge and cost over $1000. You mentioned a power washer. I have one to experiment with. I am just hoping the small scale of my works and their overall smoothness and perhaps along with some very very fine abrasives will be sufficient. I will know within a month and will keep you informed!

@zhangzheng4872 Жыл бұрын

Thank you so much for sharing, I have a question, is the bentonite clay you are using calcium or sodium based?

@LunarburnStudio Жыл бұрын

I am using Sodium Bentonite, 325 mesh.

@zhangzheng4872 Жыл бұрын

@@LunarburnStudio Thanks for your answer! This will help a lot with the ceramic shell casting I'm doing

@garyweisman2422 Жыл бұрын

Hi Thanks for the info. I’ve been batching personal foundry slurry since the 1970’s with 200 mesh mullite, r&r 830 colloidal silica, wetting agent, and carrageenan seaspen IN) .7 grams per lb of mullite flour. 800 lb batches in a horizontal home made tank. I switched to 105 mullite primary stuccos because of the zircon price jump. All has been good, smooth bronze surfaces with finger print detail after glass beading. I am curious about bentonite, although never tried it since I thought it requires a higher quality than the carrageenan. So the question is… why are we using colloidal silica as a binder? Why not something less expensive? Do u have any thoughts on alternative binders? Thanks Garyweisman

@LunarburnStudio Жыл бұрын

Is the carrageenan in your mix an additive to keep your slurry suspended? or does it have another function? But to your question, I do not know of an alternative to using colloidal silica as a binder. It is my understanding that its special quality is that it can keep an even dispersion of the silica particle across the wax. With substitutes there are inconsistencies that in return cause cracking both while green and during burnout.

@garyweisman2422 Жыл бұрын

@@LunarburnStudio hi. The carrageenan is just for suspense. I use .7 grams per lb of mulllite 200 mesh

@konstantinNeo 2 жыл бұрын

Hi. I want to cast ceramic slurry into a silicon mould and then bake the part. Will 20/80 bentonite/silica flour mixture work? Myself I have no clue. Please advice. Thank you.

@LunarburnStudio 2 жыл бұрын

the slurry doesn't really behave that way, it needs to dry a thin layer at a time. a solid mass will crack as it dries. And that much Bentonite will compromise the green strength of the slurry.

@anitalim Жыл бұрын

Do these ingredients go by really quickly? How often do you need to restock and purchase more of them (I'm assuming it probably depends on the size of the shells)?

@LunarburnStudio Жыл бұрын

One “batch” for me is typically 55lbs of silica binder and 110 lbs of silica flour (2 x 55lbs bag) Each batch makes 15-25 shell’s depending on sizes.

@deucedeuce1572 3 ай бұрын

Anyone ever try just straight drywall plaster? I thought it would be a bad idea, because of the cracking problems and also that I don't think it's waterproof after it hardens, so it can melt. That could be a good thing though if you're casting a complex part and want to be able to clean out the shell material from hard to get to areas. I just worry that it's just not a good, reliable medium for making casting shells. The person that made the video showing it didn't seem to have any problems at all and he was making pretty decent sized parts (over 50 cubic inches if I'm not mistaken).

@LunarburnStudio 3 ай бұрын

There are a number approaches but if you are looking at a plaster as your main ingredient, you are talking a variation of standard investment. I do realize there are some DIY'ers that have tried a layered approach using plaster but that is chemically different than ceramic shell. The challenge of plaster is that it does not like to release its water content in a timely way, even in a kiln burnout and cure times can take days. But if drywall plaster is all you have, I would mix silica sand into it to help it withstand the thermal shock of burnout. It will also strengthen.

@volodkovich 2 жыл бұрын

Have you ever used 200 mesh flour with the bentonite suspension agent? I know you say the 400 mesh is required but I can only get 200 mesh locally unfortunately. Will this just be a case of having to mix the slurry more often as it settles compared to using the 400 which sounds like you can leave it for a prolonged period of time?

@LunarburnStudio 2 жыл бұрын

@Bobby Breeze The 200 mesh can work, but it will definitely settle more and will require more mixing. be careful Increasing the be bentonite ratio. Too much bentonite will compromise the mix.

@volodkovich 2 жыл бұрын

@@LunarburnStudio Thanks Eric! Will let you know how it goes with the 200 mesh.

@damonpricesculpture5363 2 жыл бұрын

Hello can I ask what sort of volume i.e adding 50lbs of stucco to 25lbs of binder you get. Do you get roughly twice as much finished dipping material as original binder purchased, hope that makes sense. Just working out which is the cheapest method here in the UK as there has been a massive price increase in the Jus Dip material. Thanks

@LunarburnStudio 2 жыл бұрын

Roughly yes. I will need to top off my tank later this week and will see if I can better read on the increase of volume when mixing. Was the increase in the cost of the material or shipping?

@damonpricesculpture5363 2 жыл бұрын

@@LunarburnStudio in April I paid £2.92 per/kg today it is £4.15 per/kg Plus VAT plus delivery. The 240kg drum of Adbond works out at £2.60 per/kg, so was thinking of splitting this with a colleague who also does casting and was just wondering how much material we'd end up to share. Only just discovered your videos and they are brilliant, very informative and I am already adopting your design for my burnout kiln, thank you.

@natesenft5376 2 жыл бұрын

do you know where to get small quantities of these ingredients? I want to cast things no bigger than the palm of my hand and don’t want to spend so much money on the big buckets of slurry. Thanks.

@LunarburnStudio Жыл бұрын

Not that I know of, the reality is that this is a industrial process and the fact that we can now buy 55lb bags of each ingredient much less that you can by ready made slurry is a recent thing.

@natesenft5376 Жыл бұрын

@@LunarburnStudio ah, ok thank you. I guess i’m just gonna go with regular investment casting. Good luck casting!

@borisouedraogo7479 3 ай бұрын

Hello ! I don't have shellac ,what substance can i use to mix with alcohol,instead shellac?

@LunarburnStudio 3 ай бұрын

Some of the colloidal companies also sell wetting agents. I worked in a foundry in Texas and they used a diluted mixture of "Mop-in-glo" a floor polish/wax. Not sure of its chemical breakdown.

@borisouedraogo7479 3 ай бұрын

Thank you for your answer

@farhadmr3061 Ай бұрын

Excuse me, thank you for cooking a mold made with sodium silicate glue, what temperature and when is needed, thank you.

@LunarburnStudio 9 күн бұрын

Not sure for sodium silicate glue, but for ceramic shell I burnout to a tempeture of 900C/1650F.

@carlosmicheltorresmercado1541 Жыл бұрын

Meu querido sim vc poder liberar a tradução em português dos comentário me ajuda muito obrigado 🙏🙏🙏🙏

@LunarburnStudio Жыл бұрын

Thanks for the suggestion, Ill look into it.

@apkasanju8514 2 жыл бұрын

@nomanrajput1045 3 жыл бұрын

And quantity details

@LunarburnStudio 3 жыл бұрын

I am sorry you feel im not providing enough detail.

@nomanrajput1045 3 жыл бұрын

Plzz send me slurry making materials

@LunarburnStudio 2 жыл бұрын

Sorry for the delay. Before starting this channel I didnt realize how hard to find these materials are to find in most regions. Are there and local foundries in your ares that you can connect with?