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  1. R

    Changing Percentages When Adding Ingredients To A Base

    Hi, I just want to make sure my maths is correct before labeling my products. If I have, say, 10kg of base for a lotion or cream, and add 2% of a new ingredient, would I do the following calculation? 10,000 / 0.98 = 10,204 And therefore add 204g of the new ingredient to make it 2%? Would I...
  2. O

    CPSR lye concentration

    Hello I recently sent off my recipes to be tested with cosmeticsafetyassessment.com and received an email back stating that my water should be twice that of my lye. I use a 35% lye concentration which I perceived to be within the safe range for a water discounted soap. I used soapcalc to...