Foma 131

[Disderi]

Hello again, someone have realizes any change in Foma 131 paper lately? I Think the paper is a bit heavier, but I have a problem with it, when i toning it to selenium , after five minutes more or less washing, the toner goes out, somebody have seen something about? I am talking with Foma but i have not an answer yet.
Thank you very much.

[Mike O'Pray]

Bad luck Rodrigo. I don't use Foma paper so can't help

Mik

[Disderi]

Thank you anyway.......

[simonhall]

Foma have made changes to the emulsion of 131 and 132 quite recently. This was largely to mitigate changes that they made in 2013 to the gelatine used in their emulsions which resulted in their papers no longer working for lith printing.

I don't know whether you are having problems with paper from the very latest batches, or whether it is from a batch produced in this intervening period of about two years but there is information about emulsion batch numbers related to the changes from Tim Rudman's news letter http://www.timrudman.com/. If you sign up to his mailing list you can download recent newsletters and also his last 2013 lith printing materials update where he broke the news of the original emulsion change.

Regardless of all of that, it still seems very strange that the effect of a toner would wash out. Generally toners are meant to make permanent changes to the image silver so washing out seems very odd. What toner where you using?

[Disderi]

Great answer, thank you, i had heard something about , but i din´t know exactly what for.
I´m in contact with Foma by mail, now i am waiting for an answer .
Yes, it´s really strange the tone is gone with washing, i dónt understand because, supposedly the selenium toner is not a "stain" but a change in the quimical composition of the silver.
I have tried with three different toner - Ilford, Tetenal and one homemade- and the results was the same.....

Thanl you for your answer.