Re: Pre-shrink paper for gum (oa to Katherine)

From: Christina Z. Anderson ^lt;[email protected]>
Date: 04/03/04-04:02:00 PM Z
Message-id: <003001c419c7$4c8c83c0$6101a8c0@your6bvpxyztoq>

I coat my paper and let it dry in a room that has a window that lets light
in thru slatted venetian blinds. It is quite light in there, enough to not
require bulbs during the day, and as long as I don't have direct sunlight
hitting the print, I have experienced no problems. I suspect that there
could be some hardening of the layer, as Katharine has noticed. Whether in
practice this creates a problem, it hasn't for me. In other words, if there
was non-image exposure that "fogged" my print, I haven't noticed. Gum is
not like a gelatin silver print, where fogging will ruin a print, or, at
least, if minimal, make the print not "zing". You can still get the gum to
budge off the highlights by the soak in development--in other words, up to a
point it is not irreparable, as it is in BW printing. Who knows; maybe the
extra exposure fog adds stability to the gum layer.
     It is ironic this point has come up now, because it was because of you
guys on this list that DON'T use bug lights to coat by, that I became
liberated from that worry in the first place. Finding out that Keith coats
his gums outside in the garage or was it the shade was mind boggling from
trying to see yellow dichromate coatings under a yellow bug light.
----- Original Message -----
From: "Dave Rose" <>
To: <>
Sent: Saturday, April 03, 2004 10:00 AM
Subject: Re: Pre-shrink paper for gum (oa to Katherine)

> Differing observations under very different conditions. You're coating
> paper in a room "beside floor to ceiling (north-facing) windows and under
> regular light bulb if the outside light is dim." I'm in a sealed darkroom
> with two 100 watt bulbs. There's likely a huge difference in ambient
> levels between our two production areas. Apparently indirect daylight
> fog paper as your experience shows.
> Great website & beautiful photos, thanks for the link!
> Best regards,
> Dave Rose
> Powell, Wyoming
> ----- Original Message -----
> From: "Katharine Thayer" <>
> To: <>
> Sent: Thursday, April 01, 2004 1:48 AM
> Subject: Re: Pre-shrink paper for gum (oa to Katherine)
> > Dave Rose wrote:
> > >
> > > I mix gum solutions and coat paper under normal (incandescent) room
> > > lighting. I haven't tested it, but I believe that it would take
> > > sunlight to fog unexposed gum prints.
> > >
> >
> >
> > Here's another example of differing observations. See my illustration of
> > fogging under room lights for another point of view:
> >
> >
> >
> > look for the fuzzy brown image under the subheading: coating and
> > exposure.
> > kt
> >
Received on Sat Apr 3 16:02:14 2004

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