Originally Posted by Andy K
You're exactly right, Andy. There should be no confusion about this. 1+50 is 1 plus 50, simple addition, just like we all learned in grammer shcool.
"The first difference between 1:100 (1+99) and 1+100 for Rodinal I have to see in 35 years darkroom experience, but indeed in theorie you 're right."
It may not make any difference at 1+100 if you were to mix 1+99 (or 10+990), but what if it said to mix 1+3? Using the same reasoning as the 1+99 (or 10+990) mixture, you would actually mix your 1+3 mixture at 1+2. That would make quite a difference with most developers.