Printing my first image with SbQ, the gum dichromate alternative (SbQ ZeroChrome) !

[@nikosmamalos]

I am glad that I found your channel. It has so much and so nice information! Thank you!!!

[@riverscarstarphen2284]

Thank you for instructional videos, I am a college student who recently got in a bit of trouble for utilizing potassium dichromate for gum prints, and was looking for an alternative pigment process - this looks amazing.

[@DominiqueBossut]

Bonjour, très intéressant. Y-a t-il moyen de vous joindre pour obtenir des informations pratiques ? Merci

[@sylvainferrand351]

Je vous invite à poster vos questions ici, comme ça tout le monde pourra profiter des réponses...

[@cosminmoldovan3526]

But if I don't add any pigment I should be able to do an eco friendly gum oil print right?

[@henrieke.strecker]

Good approach. But: The recipe (Alternative Photography) contains "Phosphoric acid 85%". To me that's not a responsible handling or a good alternative to dichromate gum printing. PHOSPHORIC ACID has corrosive effects on the skin and can cause IRREVERSIBLE SKIN DAMAGE, i.e. necrosis extending through the epidermis into the dermis. It is of advantage to read the safety data sheet.

[@sylvainferrand351]

Thank you for your comment, but it's important to make things clear. Phosphoric acid is corrosive when concentrated, that's true, and you're right to point this out (wear gloves and eye protection, don't let children practice, etc.). However, it's a fairly common product, found in coffee machine descalers, for example. It is therefore as dangerous as a concentrated descaler or drain unblocker. But it is in no way comparable to dichromate. Phosphoric acid is dangerous to handle during manufacture, but afterwards it is neutralized and no longer presents a risk in itself. Dichromate, on the other hand, is toxic, carcinogenic and dangerous at every stage (when spreading the emulsion, when rinsing, for the environment...).