Copper Sulfate bleach

[dannybee]

anyone use Copper Sulfate bleach with color? does it reduce blue haze?

[Martin]

anyone use Copper Sulfate bleach with color? does it reduce blue haze?

So grain size seems to be the problem? What AgX emulsion do you use?

[dannybee]

fuji

[dannybee]

ok I've try a very weak fixer on fuji was able to reduce blue haze ... need to test this more .. looks like i may have reduced green dye (magenta) so may have to add it back in... but definitely reduces grain size ... now need to document this.. and run more testing
1 I fixed one half of the plate
2 then wash and dry
3 exposed to white light
4 develop and bleached then dry
5 compare the haze under white led light......

[dannybee]

heres test

[Martin]

fuji

So grain size is the issue. I seem to recall Fuji's grain size was said to be around 25nm.

Wisdom from the color holography guys at the 2015 Saint Peterburg symposium suggests that grain size has to be <10nm for blue recordings...

[Joe Farina]

Yes, 25nm seems too large to avoid blue scattering, especially for the short 457nm wavelength. I would think that PFG-03C or Ultimate would be a better choice.

[dannybee]

Yes, 25nm seems too large to avoid blue scattering, especially for the short 457nm wavelength. I would think that PFG-03C or Ultimate would be a better choice.

PFG-01 should work by make it panchromatic? .. just trying to work with what I have on hand... on a fixed income now