New: ADOX ADOSTAB II

[Team ADOX]

ADOX ADOSTAB II (Sistan) is available again. We improved the recipe and changed the wetting agent to a biodegradable version. It is now even more environmentally friendly.
The keeping properties have been improved as well.
Now 100% "Made in Bad Saarow" in our new photo chemical factory.

https://www.fotoimpex.com/chemistry...ith-image-stabilliser-500-ml-concentrate.html

ADOX - Innovation In Analog Photography.

 

[JPD]

That is good news! I will get a bottle the next time I order.

 

[RalphLambrecht]

ADOX ADOSTAB II (Sistan) is available again. We improved the recipe and changed the wetting agent to a biodegradable version. It is now even more environmentally friendly.
The keeping properties have been improved as well.
Now 100% "Made in Bad Saarow" in our new photo chemical factory.

https://www.fotoimpex.com/chemistry...ith-image-stabilliser-500-ml-concentrate.html

ADOX - Innovation In Analog Photography.

did the working ingredients change?

 

[Team ADOX]

did the working ingredients change?

The Sistan ingredients are 100% the original Agfa Sistan formula. And the wetting agent has been improved to a biodegradable version.

ADOX - Innovation In Analog Photography.

 

[markbau]

I'm not sure I understand what this product does. I've never heard of using a wetting agent for paper, only to avoid water marks on film. Is it some sort of toner?

 

[Andrew O'Neill]

I'm not sure I understand what this product does. I've never heard of using a wetting agent for paper, only to avoid water marks on film. Is it some sort of toner?

It's an image silver stabaliser for b/w.

 

[MattKing]

It's an image silver stabaliser for b/w.

And it provides that stabilization without affecting the image tone.
It needs to be used properly - if you don't follow its instructions, Sistan could result in damage to your prints. There is a detailed thread about that here in the archives.

 

[AgX]

I'm not sure I understand what this product does. I've never heard of using a wetting agent for paper, only to avoid water marks on film. Is it some sort of toner?

It places scavengers in the emulsion that catch silver-ions that may get released due to environmental effect, before they make nasty stains at the surface.

The wetting agent is just to facilitate dripping off the solution, especially with film. Keep in mind that is the last bath before archiving.

 

[markbau]

It places scavengers in the emulsion that catch silver-ions that may get released due to environmental effect, before they make nasty stains at the surface.

The wetting agent is just to facilitate dripping off the solution, especially with film. Keep in mind that is the last bath before archiving.

Would you use it in situations where you didn't want to selenium tone?

 

[AgX]

Sistan would be the better means concerning image stability.

If you want to apply toning for esthetic reason, you still could apply Sistan. However it must not form too high concentrations, as for instance at puddles during drying. The paper thus must be treated as film and being wiped off. See the addition of wetting agent, Team Adox referred to, in this context.

 

[RalphLambrecht]

I'm not sure I understand what this product does. I've never heard of using a wetting agent for paper, only to avoid water marks on film. Is it some sort of toner?

It's not a toner but a swilver stabilizer intended to keep silver from silvering out and creating small patches o0f metallic silver in the emulsion,often seen in the silver-rich shadow areas of a print. It's mainly an issue with RC papers and not with FB papers.

 

[AgX]

As the fibre base can form a kind of sink for those silver-salts.

 

[JPD]

I have used Sistan on FB papers that don't get any colour change in selenium and also on RC papers when I didn't want to use selenium. There have been a couple of tests of papers in climate chambers, and I remember the line: "the papers treated in Sistan don't yellow". Sistan can also be used on black and white films, but a higher dilution was recommended or there was a risk for white drying marks.

In the early 90's I had a short internship at a place that did conservation of archaeological findings and the objects were photographed and the RC prints were developed in a big machine processor and came out dry. The prints where then archived. After a while all the prints yellowed. I suggested better processing and the use of Sistan and got the answer "We aren't paid for that". There weren't that many prints made per day, so manual processing wouldn't have taken that much longer, and only one or two bottles of Sistan per year is no money to talk about.

It's not a toner but a swilver stabilizer intended to keep silver from silvering out and creating small patches o0f metallic silver in the emulsion,often seen in the silver-rich shadow areas of a print. It's mainly an issue with RC papers and not with FB papers.

I have seen silvering out on old matt FB real photo postcards. They get this blue-ish metallic sheen in the dark areas.

Sistan/Adostab is an excellent product.

 

[JPD]

When you order hand made prints from Fotoimpex lab they give the prints an archival wash and treat them in Adostab as standard procedure. But you can also choose to have them selenium or brown toned at an extra cost.

My father ordered a 24x30 FB print from the town archive once, and a few years later it got yellow spots. A good rinse and treating it in Adostab would probably stop it from deteriorating furter, but perhaps a bleach and toning in sepia would be better.