So I was thinking about joining the soap making challenge but Im not sure how to work out the percentage for the colors. If I put one tsp of color pp would that be 100% and then say I add a 1/4 tsp of black charcoal to the main color would that be 25% or do I need to weigh out my colors on a scale. Thanks so much Im not sure I can do the challenge but I'd like to try!