[pure-silver] Re: mottled tones

Well I read somewhere that aging does not stop when frozen, but greatly slowed. 
 Freezing does not affect the change in paper or film from the natural 
radiation to which all things are exposed.  Over time it does change things but 
freezing does help.  Which I could remember where I saw that though.

Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote: 
----- Original Message ----- 
From: "Dave V" 
To: 

Sent: Monday, July 16, 2007 8:12 AM
Subject: [pure-silver] Re: mottled tones


> Old trick about old paper that has been frozen. ......Take 
> out of freezer; defrost; remove only what you intend on 
> using; repackage in plastic moisture proof packages in 
> small packages; refreeze.   What is left out at room temp 
> will go bad very quickly.   Seems like the aging is 
> stopped while frozen but time accelerates if you un-freeze 
> it.
>
> Dave

     That's very interesting to know. Evidently some sort of 
change continues even when frozen. I would think 
manufacturer's would certainly know since sensitive 
materials are perishables and the safe storage interval 
would dictate the maximum time between runs.
     I have noticed that some papers age less than others. 
In general variable contrast papers have shorter shelf life 
than graded paper and cold tone paper longer life than warm 
tone paper.

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx 

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