"...this nickel plating machine I happened to have in my garage..."

You are legitimately a wizard.

For those out there thinking about doing this: careful with the type of silicone you use for the mould! Some are not safe if you are planning to create moulds for food or diy masks. The one used in the video is a platinum catalyst which is the correct one to use for this.

So let me start off with, this is brilliant and the results are amazing and you're a fricken genius. I dunno if you ever saw the video on my channel where I'd talked about trying to do exactly this. I even bought literally the exact same holograms from the same ebay supplier. But where I failed was removing the backing layer. I managed once or twice by epoxying the back of the hologram to give me something to grab and physically tear the layers apart but only ever got it to work with an "amorphous" hologram, never the images. I'm stunned it was as easy as soaking it in hydroxide and I'm kicking myself for not thinking of that. I just assumed (apparently incorrectly) that it was impossible so was going to go the hard way of making my own holograms just to have the exposed surface so I could then plate it and make my metal stamp, but now I see there's no point. This is way easier. And of course you took the concept much further than I'd ever have imagined and made the metal stamps which I'm stunned work so well. I still have all the stuff so I'm 100% going to have to try this.

8:20 A huge +1 for a video on chocolate tempering and crystal structure! I've seen too many hand-waving explanations, but an actual physical demo would surely be fascinating.

Finally chocolate bar makers can prevent cheap counterfeits! Next up on Applied Science : White Chocolate UV thread.

a little note here: the tempering process is ruined, but the chocolate is still reusable, just restart

Kids: "In the future, we will have holograms" Ebay: "Vintage hologram stickers 10¢"

14:52 * Casually uses an electron microscope the same way I'd say I used my toaster *

"dedicated video on making original holograms" --> aw yiss

The only channel on KZfaq that starts by telling you the results and showing you the end within the first ten seconds. *Even the channels we love like practical engineering and especially tech ingredients do scummy sleazy clickbait intros and titles and thumbnails* . Ben is the only one who refuses and makes you stick around by sheer awe and respect ❤️

Poor Claire, she can't even temper chocolate :

I feel like a chaos goblin for sending this video to Simplynailogical, but I regret nothing. This is such a cool technique!

A Holo Taco of chocolate! 🌮 Looking forward to a Simply Nailogical video on this.

Chocolate companies should contact this guy. Kids would love these things.

I remember in metallurgy/metallography class talking about how tricky chocolate would be to analyze using the standard polishing method since it's so soft and melts easily. Would ve interested to see how you might tackle this challenge!

I would love to see a video on chocolate tempering! A lot of the food-focused tempering resources online rely on hand-wavy black magic explanations of what's happening when tempering or why certain steps work. I'm particularly interested in what's going on in tempered but still liquid chocolate: what fraction of the cocoa butter is crystallized, how big are the crystals, what's the mix of different crystal types, etc.

Nobody tell the Nailogicals or Claire fromthebonappetittestkitchen

...and the eatable DVD was born. This idea died even before the first clogged DVD drive arrived at the local electronic recycling center.

Oh, yes +1 for a chocolate tempering and crystal phases video! That would be incredible!

Chocolatiers here in Switzerland do that and I always wondered how they do it!

I've been trying to crack a good way to make holographic edible designs for a minute, and although I don't know if I'll be able to pull this one off, it's so super helpful to understand what makes it happen!

Now that's my kind of science: snappy, obscure yet flashy, but most importantly delicious! Would love to hear more on tempeing, whether it's chocolate or metal or conductive metalized chocolate!

I used to work for a hologram manf in the mid 90s as an electroformer. The man in the hologram of that book was one of the sales man and I worked with some of the peopel who made the holograms that are on the visa and mastercards. As an electroformer I would make masters of the hologram and "shims" as they called them for printing holographic labels, baseball cards, the stickers on the motorola startac batteries... This process is called electroforming. We would receive the hologram made in photoresist on a piece of glass. It was explained to me that the laser would etch an interference pattern into the photoresist and the apsect ratio of the grove is what created the holographic image. We would placed in an acrylic jigand hold it in place with tape on the edges. We would paint conductive paint over the tape and on the jig to an electric screw terminal.We would coat the hologram and jig in the silver solution except we sprayed it on. We would put this in a tank of nickel sulfamate solution as a cathode in a soft nickle plating process. We used soft nickle plating which gave a dull gray finish on the back of the shims instead of a hard shinny nickle platting that is normally used in nickle plating things. I believe it had to do with tensile strength. I don't recall exactly. We would plate it for many hours to get a few hundred microns thick. We would start a a low current and as more nickle built up on the holgram we could increase the current since is was now a bigger conductor which would speed up the process of plating the "silver master" I think we called it. When it was thick enough we would peel the nickle plate off the hologram and have a negative which I think was also refereed to as a negative mother since it had a negative image. We would cleanup the "mother" and smooth any sharp spots on the face of the nickle plate. We would spray the silver master /negative mother with I think it was potassium dichromate. These chemicals were all sprayed in a ventilated hood while we wore respirators. This chemical would allow us to plate the face of the negative master and peel new layer of nickle off to get what I think they called a positive father. We did this many times depending on the number of nickle tanks that were free to make positive copies of them. We did this process for creating negatives and positives from the negatives . It was very critical in this plating process not to get contaminates especially greasy ones on holographic images on the plates. handling the plates just on the edges with bare hands could ruin them due to the grease from our hands to run off and across the plat. Even if I handled something in the spray booth with my bare hands and then sprayed water onto the plate, would cause the over-spray to bounce off the object I handled and take the grease with it and to the plate and ruin it. This is why spraying a release on your hologram was a bad idea. We used the cleaner "simple green" to try to remedy problems . It worked best but didn't always work The final shims I don't recall if they were positive or negative but they needed to be exactly 100 microns thick and the thickness over the whole shim had to be within a certain tolerance that I cant remember, but we had to use strategies of moving the nickle anodes around to make sure it plated evenly across the surface.They would take the shims and form them into a cylinder, I was not part of this process so I don't know it well. They would take a solid metal "roller" that was part of the machine that printed the holograms and submerge it in liquid nitrogen to shrink it and slide the cylinder made of shims over the roller to make a fiction fit. I think they ran a UV setting plastic film trough the machine which would set into the holographic shims to be the holographic product ..label...sticker... I thought you would like an explanation of the process from someone who has done it before. One suggestion I would like to make is that I heard if you put butter in chocolate is hardens shiny, maybe you will get better results

I couldn't help but notice: the process of going from a plastic master to a nickel mold is a lot like compact disc manufacturing in reverse.

I love how these videos go from zero to a hundred so quickly. One second you're talking about making a silicone mold to pour chocolate into then next thing you know you're analyzing custom made electroplated dies with an electron microscope, all in your garage. Just awesome man!

Holograms on Chocolate... Incredible, high quality Holograms on Chocolate.. made at home. This world needs more people like you.

this channel will be saved permanently in KZfaq history in the future ...the value per minute of our time is rediculous ... and is for free ..just wow and Thank You :)

This is Sufficiently Advanced Technology

"this nickel plating machine I happened to have in my garage" Yep, who does not?

Thats just awesowe! At first i thought that you will print holograms directly on chocolate like on any other surface which would be pretty complicated. But when i saw the method you use, i thought that this simplicity is just ingenious!

HOW?!? How?!!! How has this man NOT yet ushered in the technological singularity on sheer cleverness alone?

For an additional, even easier and very effective method of tempering chocolate, look up "cocoa butter silk"! With the silk, you only have to melt the chocolate, let it cool to a certain temperature, add the silk, mix until incorporated and it's tempered! I do this regularly with my home chocolate batches.

The silver plating reaction is called the tollens test, and was used to show the presence of aldehydes in solution. In this case, the aldehydes are the linear form on glucose that are formed when sugar is dissolved in water :)

This might actually be the best channel on KZfaq, along with Cody'sLab of course. Thank you, Ben.

omfg this is amazing, it's mindblowing how all the techniques and science that you literally applied for this project, this is amazing and i love it

Thanks for another fantastic video!

You could use a sous vide machine to make the chocolate tempering very easy.

This involves stuff I have like from three of my favorite channels. I couldn;t be more stoked. Thanks Ben!

The plastic holo stamp. The silver nitrate trick. Such cool.

Everyone: Wow, hologram on chocolate? so cool! Me: but can I eat it?

Sweet video! :) I see quarantine is good for Applied Science video frequency... nice job as always!

your videos never cease to amaze me. Are you really saying no one has patented a die that can stamp holograms on any plastic ? If they have not - get in there - that is really impressive. I can see many consumer items with hologram stamped plastic molds.

Add holograms on chocolate to the huge list of things I would have never thought of. But hey, at least now I understand how holograms work.. At least superficially. No doubt it'll come in handy. Cool experiments as usual, Ben!

More Tech ingredients & Applied Science collaboration..

I love how The Thought Emporium was inspired by you to make gekko tape and in turn he inspired you to make Holo-chocolate and added a bonus in the video. You guys are great. Edit: Tech Ingredients needs credit for initially popularizing the idea.

sounds like the perfect addition to edibles

How on earth do you get to think of all that awesome stuff? Better vantablack, camera lenses, now holograms (?) on chocolate (???) I am speechless after each and every video, great work!

Dont tell Claire about this....

Does this mean we can make chocolate CD and DVDs?

It absolutely blows my mind that something as viscous as tempered chocolate or silicone is capable of overcoming the surface tension necessary to get into the diffraction grating. Genuinely would not have believed this was possible before a video like this!

I learn so much from this channel I wouldn't have otherwise.

PLEASE do the chocolate tempering crystal video - that sounds fascinating

It makes me cheer every time I see an Applied Science video because the topics are so fricken intriguing! I can never guess the next video but it's always interesting!

Seriously this is my favorite channel on youtube now, my love of food an science is complete🤤

I don't know why you don't have more subscribers. This stuff is genius!

Cadbury: *WRITE THAT DOWN WRITE THAT DOWN*

sorta-clear-40, it sorta works.

Great idea :) It looks very counterintuitive and is amazing, that chocolate can be shaped that accurately

That was super neat & looks like something pretty fun to try out. Heck, looks relatively safe enough to let older kids try out.

lol, Chocolate tempering. (looks at Claire from BA)

"sorta clear". Imean, it's accurate

Jeezus, Ben... the pure variety to your videos is amazing. There is no real progression, just boom, here is simething out of left field. Holograms on Chocolate. Wow

I've loved this channel for a long time but over the last few months I've been rewatching many of these videos, treating them almost like background music. The pace, tone and sense of geniuine curiosity and exitement about the world is perfect brain-bleach when I feel assaulted by politician speak. Not exactly relevant to the topic at hand. But thanks, your work is a gem.

Wow, amazing! Love the video as always and will have to try your metal process! I found an effective way to remove chocolate without affecting the surface texture was to use a layered mold (laser cut acrylic) where the diffraction grating/bottom and the tops would be pulled away from both sides, then you can easily pop it out from the non-textured side and easy to clean, as well as quickly laser cut diff designs for the middle layer (or adjust the thickness with multiple layers). Model/output seen here: twitter.com/samykamkar/status/1259720942470656000

If you do the chocolate tempering video, I wonder if Alex French Guy Cooking would be interested in a collab--he did a good video on chocolate tempering a while back.

This is so awesome! My sister recently sent me a Twitter pic of someone that'd done this and it blew her mind. I'd seen it before and told her how it was done, but so cool to see you do this so soon after that! I would LOVE to see the different crystal states of chocolate if possible. I think it's fascinating.

Tempering is indeed a very important part of making a chocolate. It allows a homogeneous bar, prevents "fat bloom" (fat making its way onto the surface), smooth surfaces and, most practical of all, easy separation from the mold. This is complimented with a shaking phase so the chocolate can fill up any space in the mold.

I would very much like to see the science on tempered chocolate.

I would love to see a chocolate tempering.

Definitely in for the tempered chocolate video!! Amazing work as always!

This is super cool, this can easily be in a fancy restaurant as a dessert that might show whatever the customer wants!

Ah! what a cool topic! When I first saw Tech Ingredients video on the subject, I wondered if you had any ideas on how to improve the process. I also found The Thought Emporiums videos on silicone molding diffraction gratings to make gecko tape equally interesting (kzfaq.info/get/bejne/rNaEi5ZjsMq6coU.html). It would be amazing to see some sort of holographic collaboration sometime!

Melting hologram chocolate. Good for weight loss :-)

Awesome video Ben! This channel is well spent Patreon money in my opinion. I learn crazy interesting stuff from every video you put out. Happy to support your efforts. 🤙

I am SO thankful for this video. I tried to figure out for a longer time how to get rid of the foil on my beautiful holo films. I will make some resin mold instead of chocolate but now I have the startingpoint. Thank you so much

👍🤣 How about a collaboration with "This Old Tony" to make a diffraction grating ruling engine, for other kinds of candy....? 🤔

Isn't this similar to how blue butterflies produce their blue "color" ?

I've seen this on twitter, and I'm glad someone made a video on it explaining how to do it.

You never fail to surprise and inspire. Such a variety, and all epic.

"so I happened to have this nickel plating kit in my garage" Life goals

Tempering Chocolate? No one tell Claire!

i didn’t want the video to end! thanks man!

Very cool. Fun project. Thanks Ben.

Mars Inc.: Yea we actually invented this quite some time ago, we have no interest in it. Mutes phone... Mars Inc.: Get somebody on this right away! I want a holographic logo on every candy bar we make!

Now I want an electron microscope

all your projects are over the top amazing

I've always admired the thoroughness. all the trials successes and fails are fairly documented. Gotta Say, Ben share's therotical sciences and makes them practical. There must be numerous start ups using or have benefitted from the open format science experiments Ben has shared. A big thank you Ben. Good work. Good Science and Good Soul. Thank you.

I could have sworn I'd seen this video already [EDIT: Oohhh right, I'm thinking of the Tech Ingredients video -- nvm] [EDIT2: Cool -- this is a nice iteration on the ideas presented in that video. Do you have any clue as to how feasible it would be for someone to imprint their own designs? Do you need lasers or something to make these?]

First holographic images I will make is of more chocolate bars. 🤗

You never seize to amaze me with the breadth of the things that you take on and manage. Well done indeed. Such a wealth of information from you and always presented in a near mesmerizing manner. Keep it up, I for one am grateful for your videos.

I remember reading about this, in a Popular Science issue, a few decades ago. Very fascinating. Thanks for sharing this.

Do I see a NileRed beaker there?

This was super cool! And I'd love to see a video on chocolate tempering, sounds super interesting.

Isn't this how CD's are made? Very cool to see the action on the most delicious material available!

I've been waitíng for this video since I saw the Tech Ingredients video about holographic chocolate. Now I need to make some of myself!

Wow - so interesting. I love seeing you break the magic down into something we can understand.

I'm really surprised I've never seen this on an actual chocolate product. Super cool.

I'd love to learn more about chocolate tempering! great video

The easiest method to temper chocolate is called cocoa butter silk. Just melt the chocolate and add 2% by weight of cocoa butter silk finely grated to your chocolate and mix. Then just pour into molds. Cocoa butter silk is made from cocoa butter maintained at 92.5°F/33.6°C for 24 hours in water by a sous vide heater/pump ($100). It maximizes the V crystal and provides a seeding or scaffolding for the cocoa butter in the chocolate. No worries about the chocolate tempering curves. It is a DIY "mycryo" micro cocoa butter powder used commercially. Cocoa butter is polymorphic and is capable of forming 6 different crystals. Cocoa butter is a triglyceride (3 fatty acids) and is surprisingly resistant to oxidation with a long shelf life unlike other triglycerides. On a side note, there was a research paper a few years ago where palm oil was used to desalinate water by changing the phases from liquid to solid- it surprised the chemists - not very efficient though. You could probably obtain desalination with the cocoa butter as well - Ben could be the first to do it and measure the efficiency. If crystallization rocks your world, take a listen to Dr. Rupert Sheldrake, a chemist talks about melting points and how they are not constant as you would think due to his proposed morphic resonance theory - quite interesting.