From: Judy Seigel (jseigel@panix.com)
Date: 05/28/03-05:51:12 PM Z
On Mon, 26 May 2003, ericawd wrote:
> To anyone who uses a 5% solution of potassium metabisulfite to clear their gums:
>
> 1. Any experience as to how long it lasts after mixing?
>
> 2. How many prints will a particular volume clear? (e.g.. hypo clearing agent will clear a certain surface of film)
>
Hypo clearing agent works invisibly, that is, you can't tell by looking if
it's cleared -- so you need a guage for how many it's safe to put through
it.
With gum clearing, you see the difference -- which varies according to
size of print, thickness of the paper, and depth of the stain. Watch how
long it takes the first print to clear, when it starts to take a whole lot
longer --- mix fresh.
Judy
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