I feel very ignorant asking this question, but how do I mix pyrocat HD? I know the chemical formula to make the stock solutions, but how do I mix the stock solutions and water? The formula calls for 1 part A + 1 part B + 100mL of water. But what is the "1 part," is it all of the stock solution created in the first place? In this case I mix them together and I will have 300mL of working solution and I just need to figure out how to adjust the formulae to end up with the 500 mL I need for the unicolor tube.

Sorry for all of the questions about this but chemistry isn't my area of expertise... I'm a three times over liberal arts major