ph strips

I have been noticing that pH strips could start out one color and then after several hours ie after the strips have dried, change in color to the extent that I might have interpreted the results differently if I observed the results at only one of the 2 times. My process is that I put several...

I am pulling out my hair trying to get my olive oil liquid soap right. Here's my recipe: 24 oz. olive oil 5 oz. potassium hydroxide 5 oz. water 10 oz. glycerin All went well, soap diluted just fine and was clear as a bell. I tested the pH in three different ways: pH strips...