Drying marks

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thycore
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Drying marks

Post by thycore » Wed Oct 17, 2018 11:59 am

Hello !

I have like an increasing problem of drying marks on my recent holograms, it seems correlated to the amount of flo I'm using in the flo bath, but if I don't add any flo I have marks aswell.

Could it be related to "maybe" old chemistry ? I see my developer bath has grown some little filaments inside (silver?), would these attach to the gelatin and cause "relief" which would then give these drying marks ?

Anyone experienced the same already ?
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Steven
Posts: 37
Joined: Sat Jan 31, 2015 8:14 pm
Location: Cornwall, UK

Re: Drying marks

Post by Steven » Mon Oct 22, 2018 1:29 pm

I have not worked with silver halide chemistry for nearly thirty years, but I used to use a good quality window squeegee after the final rinse.
If done properly, you should not have any droplets on the emulsion surface.
I was using the Ilford red sensitized holo film at the time and a rehalogenating bleach process.

Steven.
Success through failure - the amateur DCG holographer's path to enlightenment.

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