Have no idea why a few are having trouble with casting the yellow or the green. I have been casting it weekly (1-3 times) and have had zero issues with casting. The only ones here on the forum are ones having problems.
I use a 30 yr old broken arm caster, satincast and water, reg burnout and get great castings consistently. The people that I print for and do their own casing are having consistent results also.
There are only three major things that contribute to good castings. Cured prints, adequate air flow, and reaching the high end temp and holding it for 2 to 3 hrs (more if u cast large items if u prefer). I have never stayed at the high end longer than 2 hrs. even for 30 gram rings.
That being said there are numerous things that can ruin a casting. Just a few are metal to cold or two hot. Spinning to fast if using that method. Contaminated metal, contaminated crucibal. Bad mixing techniques with the investment. Improper spruing or pits in the wax or resin model that causes small pieces of plaster to break off during casting. I could go on and on.
As I have said many times casting is as much art as it is science. Technique, tecnique,tecnique. Don't blame the product when so many others are using it successfully.
Not attacking anyone here. When u get frustrated, for whatever reason, sometimes u need to be reminded to take another look at the process. I had it happen to me and I tried to blame the resin formula being changed. Even went as far as to call Mike and ask if they had changed the formulation. Turned out changing from my old industrial sized oven to the new 8 x 8 inch oven was the problem. Air flow. Fixed that by drilling holes in the bottom of the oven, and all my problems went away. This was after I had been casting 1:1 mix since 2013 ( over 2 yrs). Things can go south and when they do there is a reason. If the formulation were the problem, everyone using it would be having problems.
Dance like nobody's watching!