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Thanks for the informations !

if I understand correctly, the idea is to spread toner only on the printed surface of the paper?
Have you tried using the brush to treat only certain areas, shadows...

You can find it online as a cosmetic supply under the name polysorbate20, generally in the form of a dissolving powder

I had the same kind of problem with cyanotype HPR, which I solved by...

Thanks for this link
it will become complicated to make your films travel...

if you replace the original bevelled glass plates of the negative holder by straight-edged plates, it works!

Hello,
they are enlargers manufactured in France in the 60s for the formats 9x12cm and 13x18cm for certain models. Simple, robust and heavy (so stable)
226618

Hi to all, I'm hubert, 50 years old, I live near the sea in Marseille (France). I regularly carry my camera (6x6, 4x5 or 5x7) in the calanques, and a little bit everywhere else.
I use alternative...