Hello All, brand new to this forum and this is my first post. Sorry it's a bit long.
I started making chocolate from beans this past October, lots of fun and I've been fairly successful. In the beginning of December I started on bonbons with colored cocoa butter and it's also been fun and for the most part successful. Early attempts at hand brushing and airbrushing colored cocoa butter in the polycarbonate mold cavities were fine, everything was releasing OK. About a week ago I started having problems with the color sticking to the mold, almost always at the crown of the hemisphere. I'm working with colors made from mixing fat dispersible pigments (Roxy and Rich) at around 10%.
I've read a number of posts on this forum and elsewhere about it, people point to improper tempering most often, with mold and ambient temperature mentioned as well. I've tried two of the most suggested techniques for tempering the butter. First was heating to 105F (40C), then cooling to 78F (26C), then heating back up to 86F-89F (30C-31C). Today I went with the technique mentioned by Kriss Harvey and others, heat to 100F (38C), then cool to 86F (30C) and use. I had failures in about 1/3 of the 24 cavities of the mold in BOTH situations.
The overall process: The molds are washed in warm water with dish detergent, dried and fastidiously cleaned with a cotton puff. With the mold at room temperature I use a stamp to put the color in the cavity, repeatedly working it to get the pattern. Then spray a thin coat of white. I refrigerate briefly then let the mold sit for a couple hours at room temperature. For the shell, I've used both white chocolate and dark, it doesn't seem to matter. Shell thickness is not terribly thin or overly thick compared to what I've seen in demo's online. The shell chocolates are properly tempered with sylk. I refrigerate for 10 minutes after shelling. Then let the molds sit for a number of hours at room temperature before adding ganache (at 75F usually), then refrigerating briefly until the fill sets. Then I cap, again with tempered chocolate at around 89F (32C). After scraping once I add a small amount of chocolate and an acetate sheet, and spread flat with the spatula. Once again I refrigerate briefly. I've been going into the fridge right away and wonder if I should be waiting a bit beforehand, I've seen this suggested but in my lack of experience I don't know why this should matter. After this I have tried waiting just an hour to de-mold, and also waiting about 4 hours. I still get failures here and there. In the early attempts before this problem showed up, I was de-molding within an hour of coming out of the fridge and had good releases, but that wasn't when I was using the stamp to manipulate the color so I'm wondering if that is a factor. Also, I live in the Pacific NW and its been pretty rainy lately, so humidity is high outside, but only around 50% in my home.
**Here's something that I did today that puzzles me, and may indicate where the problem lies. After shelling and cooling, I turned over half of the shells in the mold. All were perfect. But after filling, capping and releasing, some of those stuck (???).
I expect there is a wealth of experience here, if anyone has anything helpful I'd appreciate it. Thanks in advance.
Phil