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Digital BW, The Print

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Re: [Digital BW] Silver Rag Yellowing

2012-08-27 by ClaytonJ

Hello Ernst,

I'm sorry, I don't quite get what you mean...


> It must have been something that was in that paper from the 
>beginning. I  presume you did not rinse that paper for some reason. 

Rinse?  I haven't rinsed (or washed) prints since the darkroom days.  Not sure what you mean.


>A sprayed varnish would show on one side only. Contamination, 
>particles from the air around it, packaging etc most likely would >have affected the other 
> papers in the stack. Biological processes usually are not contained 
> within the paper itself but transfer byproducts to the other papers in 
> contact. If it is all around the edges light may not be the cause but 
> more likely oxygen etc. Light would be less even around the edges with a 
> stack in a bookshelf.
> 
> Sizing of the paper or an anti-curl coating at the back with the same 
> bad binder as used in the top coating. Bad batches of cotton fiber. 
> Exposure to daylight might work if it is a sulfur or nitrogen effect. If 
> it was oxygen or light it could worsen the effect. 

>Nothing wasted to try that with one sheet, I guess.

Try what?  Sorry to be so dense but I think I'm missing something.

Paul should have received the prints by now, perhaps he will have some comments...


Regards,
Clayton


Info on black and white digital printing at    
http://www.cjcom.net/digiprnarts.htm
I-Trak 3.0   http://www.cjcom.net/itrak.htm

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