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Delta 1 print calculator

Hi marciofs,

These are similar to Kodak Projection Print Scale which are useful, though not entirely necessary if you already know how to make a test strip.

I sometimes use the print scale when kicking out some quick and dirty prints. But prefer a test strip for anything important.
 
They also serve as a sort of step wedge - good for checking if you have problems with over-used developer or deteriorated old paper.

I used the Kodak version for years.