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Hello! Thanks for all your comments!! They are very, very useful. Sorry I did not describe the testing method: I add 1 g of soap in 99 ml of distilled water (at room temperature), agitating until it dissolves and then meassuring with an Orion bench pH meter. shunt2011: thank you for that...

Hello, has anyone studied the pH in their soap from the day made throughout the curing process? I just started monitoring mine with a calibrated electronic pHmeter. I was assuming I would have a curve going downwards, since the reaction of lye and oils would cause the pH to tend more to neutral...

I want to let you all know that after a series of different tests I've come to the conclusion that it was an excess of lye probably interacting with the minerals of the water, since I used tap water. I've changed the recipe and they came out beautifully, colors look great and are quite stable...

shunt2011 Thanks for the advice! I'll do that :)

Thank you! Thanks to all the people who are trying to figure this out, I will test all theories and let you know what happens. The recipe I am using is not mine, is a recipe that already existed and has a lot of problems, evidently.

What does this mean? Sorry, I'm not familiar with the language yet... What does DOS and zap test mean? Thank you

The water that I used is regular purified drinking water (not from the tap, not distilled). The exact recipe (without compensating for taking away the fragrance and colour solution = very purple bar): Ingredient QTY (KG) Water 0.54 Lye 0.25 Soy oil 0.533333 Palm oil...

Recipe The moulds are old but have always been used to make soap. They are supposed to be 100% stainless steel but they do have a rubber between the bottom and the walls to prevent leaking. The procedure: I melt coconut oil + beeswax + shea butter + cocoa butter. We pour all melted oils in...

Thank you for so many thoughts on this issue. The molds I use have always been used to make soap. They are supposed to be of stainless steel, I don't know which grade though. They are open, not precisely a column, they have four walls and a bottom but the top is open. The purple color is on all...

Hello, I just made two bars of plain soap, no fragrance, no color. I let them sit in the mold for 24 hrs, then took them out and one was light purple, the other one was white. With time the light purple bar became darker and the white bar became light purple. The color is only on the outside...