[alt-photo] Re: Gum Printing: Looking for some wisdom/better link

[Marek Matusz]

Sorry for the link that was somehow was cut short and points to all my albums
 
Here is the link to just gum testing album
 
https://plus.google.com/photos/105732508998271877151/albums?banner=pwa&gpsrc=pwrd1#photos/105732508998271877151/albums/5390693593160449681
 
Marek
 

> From: marekmatusz at hotmail.com
> To: alt-photo-process-list at lists.altphotolist.org
> Date: Mon, 11 Mar 2013 21:36:27 +0000
> Subject: [alt-photo] Re: Gum Printing: Looking for some wisdom
> 
> 
> Jennifer,
> 
> I forgot that I posted these tests a while back
> 
> https://plus.google.com/photos/105732508998271877151/albums?banner=pwa&gpsrc=pwrd1#
> 
> Marek
> 
> 
> > From: darkroommanager at cornell.edu
> > To: alt-photo-process-list at lists.altphotolist.org
> > Date: Mon, 11 Mar 2013 18:26:52 +0000
> > Subject: [alt-photo] Re: Gum Printing: Looking for some wisdom
> > 
> > Hello all,
> > 
> > I am reporting back with the tests I made last Friday. I was going to mix
> > new Ammonium Dichromate, but I did not have a new bottle. So, I decided
> > to retest my original test of Ammonium Dichromate. You can view the tests
> > here: http://www.flickr.com/photos/93779173@N03/sets/72157632974249458/
> > 
> > I think that I now have a good jumping off point with these tests. This
> > week I hope to work on the calibration of the QuadTone Rip negative.
> > 
> > Thank you for your help!
> > Best,
> > Jennifer Gioffre
> > Teaching Support Specialist
> > 
> > Architecture Art and Planning
> > Cornell University
> > 120 Tjaden Hall
> > Ithaca, NY 14853
> > 
> > Office: 607-255-4207
> > Fax: 607-255-3462
> > jmg393 at cornell.edu
> > darkroommanager at cornell.edu
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > On 3/7/13 1:56 PM, "Kees Brandenburg" <workshops at polychrome.nl> wrote:
> > 
> > >Hi Jennifer,
> > >
> > >As we are talking about gum, let's not forget this variable. What gum
> > >arabic do you use? Premixed or self mixed, and at what concentration and
> > >baumé? I'm using a 14-14,5 baumé self mixed gum. This is about 26-26,5%
> > >
> > >Looking at your exposure times for cyano and van dyke, compared to mine
> > >(6 and 4min) I would say that you would end up somewhere around 10
> > >minutes with your bank of UV and normal gum sensitivity. I find your
> > >pigment concentration rather low. With 'normal' strenght gum I am using 1
> > >gram per 20ml gum for winsor blue and lamp black on gelitin/glut sized
> > >paper and never see any stain.
> > >
> > >With dichromate I'm a 'replenisher'. When the bottle seems to empty with
> > >a coming workshop or project, I make some new and fill the bottle up.
> > >From time to time it stands for several weeks or more.
> > >
> > >kees
> > >_______________________________________________
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> > >
> > 
> > 
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