Palladium toning of BW negatives and its effect

[Mustafa Umut Sarac]

Few years ago , I opened a thread on palladium toning of bw slides and result was 1 grams of Bostick Sullivan Palladium is able to make a toner for 500cc or half a liter of paterson tank.

I love palladium prints but is there a profit to tone the 35mm negatives for scan or 120 negatives for contact print ?

• Denser negatives ?
• What about the grades ?
• Do palladium replace or stick to silver one to one or is there a mechanism I dont know ?
• Is sticking to palladium to silver good thing ?
• Is there light scatter , corner details different and worth to expense or is it a dream ?

Would there be a staining , tanning effect like pyro ?

Its not possible to me to enter collecting chemicals for slide development nowadays , nobody sells few grams and lots of chemicals are lots of money.

Umut

 

[erikg]

Can't help you with Palladium, but I imagine you know about using selenium. Gold is sometimes used as well. There is believed to be some archival benefit. My guess is that palladium would behave like selenium, in that it binds to the silver creating a new compound. With selenium and gold is a color change and a small increase in overall contrast as the effect is proportional to the silver density. No stain, no tanning of the gelatin. The archival benefit derives from making the image more impervious to atmospheric degradation.

 

[Mustafa Umut Sarac]

Thank you very much Erik.

Umut