U of S | Mailing List Archive | alt-photo-process-l | Re: Newbie Gum fun Continued

Re: Newbie Gum fun Continued

Hi Judy,

Thanks for that. The link you sent is missing a " l " at the end. 
Wow great resource!

Ivory black, alrighty going to buy some now :)


 On Tue Apr 24 13:46 , Judy Seigel <jseigel@panix.com> sent:

>On Tue, 24 Apr 2007, Jacek Gonsalves wrote:
>If you go to www.alternativephotography.com/books/js_post_factory.htm 
>you'll find the first issue of Post-Factory Photography, which has an 
>extended chapter on gum printing, a distillation not only of 14 years 
>teaching the process to and photography art students, but also my own 
>extensive testing. You can download it as PDF for free.
>Meanwhile, your rundown suggests a new swimmer beginning on the high 
>diving board (to me, anyway). For instance, in my experience, lamp black 
>is one of the most difficult pigments to use. I'd suggest (and do in the 
>article) starting with some easier colors, maybe a burnt sienna, tho if 
>you want winsor newton and a black, their ivory black, while weaker, is 
>And although some high-diving board printers do use gelatin size without 
>a hardener, and effects can be very nice... not advisable to begin with.
>> Hi all,
>> Well I finally took the plunge on the weekend and did my first ever
>> print in gum.
>> The results were...well something actually came up and I can see I have
>> a long way to go! :)
>> I used W&N lamp black tube, found I couldn't weigh it on my scale when I
>> squeezed 2 pea sizes out, nothing registered on the scale! :)
>> The paper itself got stained perhaps of too much pigment or because I
>> didn't add enough gelatin to the paper?
>> My paper seemed to have curled and the negative seems to not have sat
>> comfortably on it, even with a heavy glass on. I might have to put
>> something heavier or try keeping the paper flat when drying with all the
>> preshrinking and gelatin. Perhaps I can find plans on the net to build a
>> Contact Frame?
>> The Arches paper Smooth 300gsm, I had an issue with dotted speckles, I
>> found that the water preshrinking I used wasnt that hot. The water
>> couldnt penetrate the whole paper, therefore getting speckles in the
>> paper. Also the fact I was preshrinking for only 10 mins.
>> I used this paper to develop a print, and the part where you can see the
>> dotted speckles, has been stained with the lamp black pigment, the rest
>> seemed unstained.
>> I ended up using boiling water to preshrinking another batch of the same
>> Arches paper, and I got no more speckles! Though I might have damaged
>> the actual manufacturers hardening of the paper? Also it really gave off
>> fumes with the boiling hot water, I had to take it outside.
>> I tried a batch, Katharine suggestion of below 140F(60C), unfortunately
>> it still has the dotty speckles. I changed the water at least 4 times,
>> their still there! :(
>> Reading the Altlist I see some people just use lukewarm water to
>> preshrinking?
>> Also what paper do you use and how do you preshrinking it? With boiling
>> hot water, lukewarm water etc?
>> I also tried Acquarello Fabriano cold press with no preshrinking, a
>> brushed on gelatin on one side. Developed the paper and got staining.
>> Perhaps another gelatin coat would have fixed it or less pigment?
>> I'm not using any hardners in my gelatin and perhaps that could also
>> account for the staining.
>> Is a RED safelight, ones used in the darkroom safe to use when coating
>> gum? What do you use?
>> More to come...
>> Thanks
>> Jacek