Hi all! I just received Cyanotype kit from Photographers Formulary and have a question regarding mixing the chemicals. I'm currently on break at work so I don't have the specifics with me, but from what I remember reading last night was something to the effect that you mix all of the contents of bag A with a gallon of water, and the same for bag B. Since dry chemicals have a longer shelf life than wet, I want to only use half of each dry chemical. Does anyone know if I can do this, just roughly mass out half of each chemical and mix with half the amount of water? I don't see any reason why I can't, I guess I'm just hesitant on how exact I have to measure out half of each. Any suggestions? Could I just eye-ball half or should I take it to a digital scale?