Dear people, may I introduce myself & bend your ears for some of the major prolblems I am having in my candle making. I Work for a small soap making company in NZ and recently we have gone into soy wax production and boy am I encounting problems. Unfortunately our cilents want the perfect model, not the "a la natural" that soy is producing for us. My biggest prob yet aside from the mottling or frosting, is when my candles harden I encounter the cracking problem, which is a single line running around the perimeter, appoximately 5 -10 mm from the tins edge and about 3mm deep. Do you have any idea what may be leading up to this. Sometimes it is only a obvious line and not actually cracked but never the lessa line is there. I use Ecosoya CB 135, Pourette colour chips and our own frangances that we get made up or the cilent does. Any help would be greatly received.