>>3826495Dodging and burning, in combination with split contrast.
In every set of numbers, the first number is the amount of extra (or less) seconds of exposure in the enlarger for burning (respectively dodging), while the second number after the / is the contrast filter used for that burn or dodge, ranging from 0 to 5.
When dodging and burning with different filters, you get more selective control and "efficiency" in your dodge and burn.
The low contrast exposure (0) will affect mostly the highlights, so if you want to burn in some detail in your highlights without further darkening the darker areas, you burn using the 0 contrast filter.
The high contrast exposure (5) will affect mostly the shadows, so if you wanna brighten up and bring some details in the shadows without further lightening the lighter areas, you dodge using the 5 contrast filter.
If you want to uniformly lighten or darken an area without affecting its local contrast, you have to dodge or burn with both filters (successively, not at the same time obviously), preserving the ration of your base exposure.
For instance if your base exposure is 3 seconds at grade 0 and 2 seconds at grade 5 (3:2 ratio), and you want an area 1 stop darker without altering its contrast, you burn some extra time *at the same ration* as your base exposure. So you burn in 3 seconds at grade 0 and 2 seconds at grade 5.
This explains why some areas have two sets of numbers instead of one.
That said, some areas in the final print don't correspond to the notes in the work print, to my eye at least.
Take (
>>3826484) for instance.
First the things that make sense: the bottom of the flag for example. The notes say -2/0, i.e. a dodge at low contrast, which would give brighter highlights in the area without affecting the dark shadows. Now look the final print, indeed the white stripes of the flag are lighter while the dark stripes remain dark. This makes sense and is what's expected.
