Quote Originally Posted by dancqu
So, 1:1 = 1+0 ?

I don't read it that way. I read 2:5, two parts to five parts,
two ml to five ml, etc. That's a ratio : . Dan
Then, if you are saying "to", you mean 2 parts diluted "to" five parts, this will yield five parts total. In this case 1:1 would equal 1+0, or 'full strength'.

But if you mean "to" to mean + (why not say +) you would have 7 parts in total.

This is my question. Resolved: In photographic chemistry : seens to mean +. In the future I will use the plus sign and hope Anchell etal do the same.

thanks to all