Quote Originally Posted by Jüri View Post
For me 1:10 is 1 part of total of 10 parts. 1+10 is 1 part plus 10 parts. Simple.
Not always simple though.

Sometimes you see "dilute 1:1 with water". Does that mean you don't add any water?!!

To me it means a ratio of one part developer (or whatever) to one part water.