Re: silly paper wetting question

I think it has to do with the amount of internal sizing. A paper full of
sizing cannot absorb enough water to sink. A paper with just surface sizing
will sink after the water makes it through the sizing layer and starts
filling the pore space.

FYI, when I am doing platinum printing, I use this characteristic of paper
to determine if I will let a paper just air dry under a fan or whether I
forced air dry it with a hairdryer. The 'sinkers' tend to get all mushy and
low Dmax unless you forced-air dry them, probably because the sensitizer is
sinking in too deeply. The 'floaters' do better if I just let them dry at
ambient temperature under a low velocity fan, which I think allows the
sensitizer to sink in a little deeper. I prefer the floaters in general.

Clay
----- Original Message -----
From: "Christina Z. Anderson" <zphoto@bellsouth.net>
To: "Alt List" <alt-photo-process-l@skyway.usask.ca>
Sent: Friday, March 19, 2004 11:11 AM
Subject: silly paper wetting question

> Hi all,
> I've been shrinking paper: magnani pescia, uno, artistico, arches
> aquarelle. I notice that aquarelle becomes transparent and sinks to the
> bottom of the tub. Why would one paper sink and another float? All the
> others float. All are same weight (140 lb).
> Chris
> PS I'll be sizing this batch with glutaraldehyde...since I've standardized
> my procedure so much, and have a few glyoxal sized sheets still on hand, I
> may be able to notice a difference if one exists, and will report back on
> this...
>
>
>
Received on Fri Mar 19 11:24:46 2004