What an interesting suggestion about paper aging, that it starts from the date you open it rather than the date of manufacture. On Saturday I opened a box of grade 4 Ilfospeed that has been sitting around at ambient temperatures since I bought it some time between 1981 and 1984. (I don't remember why I bought it, because I only ever seemed to use grade 2 or 3 fibre based paper). Over about 25 years it has probably dropped a grade in contrast, but it still seems quite fast in Bromophen, with no fog at all . Don Sweet ----- Original Message ----- From: "Nicholas O. Lindan" <nolindan@xxxxxxxxxxxxx> To: <pure-silver@xxxxxxxxxxxxx> Sent: Wednesday, April 16, 2008 1:53 AM Subject: [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 > > ============================================================================ ================================= > To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there. ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.