heat tunnels

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  1. M

    Hp PVC molds - heat tunner prevention

    Hp PVC molds - heat tunnel prevention Hi, new to soap making, I love the round molds with pvc pipe. my problem is everytime i get the long indents, i am assuming they are from heat/steam trying to escape. I have triedcolling hp soap a good 20 minutes before putting in mold, i have tried...