[pure-silver] Re: paper speed variation

"Shannon Stoney":
I have a new box of 5x7 ilford multigrade warmtone glossy paper. I also have an older box of the same paper in 8x10 size. The 5x7 paper is at least a stop faster than the 8x10 paper.
Perfectly normal. I find paper loses 1/2 a stop and 1/2 a grade over the first 6 months of use. 


I don't know when it was made
As near as I can tell, opening the box and letting air get at the paper starts the process - a few sheets left in a paper safe age very quickly. 
Unopened boxes keep their speed.

You need the date the paper was opened, not
made.  Not that it will do you any good ...
I am sure the manufacturing date does have some influence. 


Does this happen very often?


All the time.

Why does it happen?  I haven't a clue.

==
Nicholas O. Lindan
Cleveland Engineering Design, LLC
Cleveland, Ohio 44121

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