Those bars are a real improvement. The unjaded and honest commentary on the video is refreshing to say the least . Keep up the great work.

Keep crushing & doing what you do.. this is fascinating!!

Really enjoying the videos! I'm seeing you make a very similar journey learning through trial and error. My first ingot mold I purchased was the 5 lb PMC and it went so well I didn't realize realize the importance of a quality mold. I poured around 45 bars with that mold and then switched to cast molds to try to lower operating costs. I am not happy with the finish and it takes a lot more sanding and polishing. One suggestion I would make is with your propane. I was able to get my hands on a 100lb tank for free and I had it recertified for 10 bucks. It seems to last so much longer. I have poured many different bars of copper, brass, and aluminum and I haven't had to refill it yet. I keep a small one around in case the 100 pounder runs out. It doesn't frost up and it is only $65 to fill at Ace Hardware. Keep up the good work.

Those are some damn good pours with those pmc molds.

Thanks for the information. I started melting and pouring copper this summer and it helps when there are others who are way ahead of me. :) i thought about not using the borax since it does mess things up (used to much in one melt). The borax has messed up my crucible a bit but i'm just trying to get the bars for now, nothing fancy and just learning. I think i did about 100 pounds now and hoping to do several hundred pounds by the end of the fall. Great videos by the way and looking forward to watching other videos.

I would try argon encapsulation. No oxygen, no oxidation = clean metal It is denser than our atmosphere so it will settle into the mold, also as a compressed gas it should help cool your mould. As far as stamping, i would try and have your logo raised into the bottom of the mould (laser etched as a negative? ) so there's no actual stamping it's automatically part of the bar. The bottoms of the mould are the top of the bar which are always clean, then you grind the bottom of the bar to weight and you're done. Just some thoughts to share.

@:045 i enjoy the way you record build, then edit videos is great. though the crash is part of the reason why i said i would enjoy more updates on the copper. but yeah my attention span can last longer than 30 seconds also.

@25:57 we want more brownies!

@19:35 where are the brownies!?

for the perfect bar put the bar in a graphite mold with a cover and put in a kiln. just copper nothing else

From what I understand, the only real reason to heat the mold is to remove any moisture. I have not had it happen or even seen it myself, but I guess pouring into a mold with even a small amount of moisture can get really ugly quick like. It basically has a steam explosion. Other than that I don't know another verified reason to heat molds. Like you said before I just "kiss the mold" with the torch. Lol. I hit it before I start melting in my dish then a few minutes later right before I pour I touch it again for a few seconds. Now granted I'm dealing with much less volume than you are and a different metal with slightly different properties, but I have really good results that way. Ya as far as borax, I treat my melt dishes with it when I first use the dish and that's about it. I don't add any when I melt the metal. Once in a while a tiny bit comes with the pour and ends up on the top of the pour. I just drop the contaminated ones in a bit of sulfuric acid and water to eat it off and then it comes out pure.