I recently starting making my own soap. The first mold I made used 12 oz of silicone and works well. After that, I made three more with thinner walls using 4 oz of silicone. Does a thin mold wall affect soap? The smooth bar on the right is from my thick mold. The left and center, with weird air pockets, is from my thin molds. They only seem to be on the outside, where the soap and silicone would have touched. Yes, it is the same batch of soap. If I had air bubbles in my mix, I would assume all the soap would look like it had air bubbles in it. What could be some causes of these strange air pockets along the outside? I tried a second time, and the same results happened. I used the Cold Process method. I did not put this in the oven. After 24 hours, i did freeze the soap to take it out of the mold easily. My recipe: 957g Sunflower Oil + 130.5g Lye + 362.5g water. I mix at 140F and pour at a medium trace. I do burp my stick blender And I pour my lye water on my stick blender as I mix it into the oils. *- Edit Update -* It might be possible that my soap is "pitting"? That the gel phase is getting too hot and begins to boil. I will try another batch of soap, but this time I will not cover my soap with blankets. Hopefully, this will do the trick! I just made a new batch and will update with results!