U of S | Mailing List Archive | alt-photo-process-l | RE: Gum over Cyanotypes

RE: Gum over Cyanotypes

Thanks Marek will try this.

It's amazing that you can print 10 layers w/o registration problems using
the same negative. In my practice gum further shrinks paper when drying,
moreso where it's thicker than average (= dark shades of the print). I can
see the relief on the back of the paper starting with the 3rd layer... And
it's pretty stiff to the point of being able to curl 300gsm paper in case
of low key images. Now I'm confused. Will try thoroughly shrink the paper
as you/Don and others describe and see what happens...


28 Nisan 2009, Salı, 9:41 pm tarihinde, Marek Matusz yazmış:
> Loris,
> I soak my papers (FA traditional or extra white) in warm water for about
> an hour. Move the papers around during the soak. My definition of warm is
> to stick my hand and feel the temperature. If it feels cold it is too
> cold. If it feels like taking the bath it is warm. Never had any issues
> with multiple gum registration from layer 1 to 10.
> In the begining I tried a very hot water soak following the adivice from
> the list, but found it unnecessary.
> Marek
>> Date: Tue, 28 Apr 2009 20:05:49 +0300
>> From: mail@loris.medici.name
>> Subject: Re: Gum over Cyanotypes
>> To: alt-photo-process-l@usask.ca
>> OK, thanks much, will keep that in mind for the next batch. What is the
>> recommended max. temperature and nominal time for doing it right?
>> Regards,
>> Loris.
>> 28 Nisan 2009, Salı, 7:33 pm tarihinde, davidhatton@totalise.co.uk
>> yazmış:
>> >
>> > Hi Loris,
>> > PS.
>> > The paper should be soaked in fairly hot paper to allow the fibres to
>> > move one against the other and shrink fully. OR you could soak in room
>> > temp water for 12 hours or so
>> > David