Hello all, I live up north and am trying to make container candles that can be shipped via transport truck in below freezing temperatures. I am working with 8oz clear glass tumblers, IGI Parafflex 4630A as my base wax, and 8% FO. As you may have guessed, I am having issues with the wax pulling away from the glass after sitting in the freezer for a while. I have been experimenting with different additives like petrolatum and soft microcrystalline but I haven't had consistent success across my testing. Maybe 1/4 of the candles I make will randomly survive numerous freeze/thaw tests but most of them pull away/form spots after 1 or 2 trips to the freezer. I mostly would like to know if anyone believes this is an achievable task or if anyone has had consistent freeze/thaw success with their glass containers.
Any advice, ideas, or stories would be very much appreciated.
Thanks