clearing kodachrome mask permanently.

fotoobscura · Mar 10, 2016

I've figured a bleach ratio to clear Kodachrome to near-perfect BW negatives while they're wet (like zero color mask, crystal clear frame markers) However, I've noticed that after drying the negatives become much darker. Not as dark as before but not nearly as clear while wet.

Can anyone think of a solution for this? re-fix?

Thanks,
FO

gzhuang · Mar 10, 2016

Spot on with refixing.

fotoobscura · Mar 10, 2016

Thank you for the re-confirm.

Smudger · Mar 10, 2016

fotoobscura said:
I've figured a bleach ratio to clear Kodachrome to near-perfect BW negatives while they're wet (like zero color mask, crystal clear frame markers) However, I've noticed that after drying the negatives become much darker. Not as dark as before but not nearly as clear while wet.

Can anyone think of a solution for this? re-fix?

Thanks,
FO

I would welcome more information on your bleach ratio..

Photo Engineer · Mar 10, 2016

Ummm, just FYI, it is not a mask. It is the yellow filter layer (named CLS for Carey Lea).

Prof_Pixel · Mar 10, 2016

Photo Engineer said:
Ummm, just FYI, it is not a mask. It is the yellow filter layer (named CLS for Carey Lea).

.. which is very fine silver particles

georgegrosu · Mar 11, 2016

FO, from what I understand, you want to remove (reduce) the fog of color negative.
From reddish yellow to become closer to white?
Here is an amendment of dyes formed in negative.
I do this with positive color.
The print film goes an acidic solution (H2SO4) and according to the pH at which dries film
picture will get out openly.
Careful! the film does not wash after acid solution.
You must test your negative on work to see how various concentrations of acid and colour.

In connection with the silver particle in the film they are in undeveloped film.
In phase bleaching and fixing them removed the silver particle.

George

Prof_Pixel · Mar 12, 2016

For more information on Carey Lea silver see: (there was a url link here which no longer exists)

JoJo · Mar 15, 2016

http://www.kodak.com/global/en/consumer/products/pdf/ae31.pdf

Right side on top.

clearing kodachrome mask permanently.

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