RE: How many layers of gum is too many?
> Maybe the gum exporters including Sorry Chris, Katharine and Judy, I meant gum experts! J -----Original Message----- From: john@johnbrewerphotography.com [mailto:john@johnbrewerphotography.com] Sent: 12 August 2008 01:38 To: alt-photo-process-l@usask.ca Subject: RE: How many layers of gum is too many? Hi Laura What is your method of sizing? > I really had to attack the paper with a brush during developing just to get any image at all. Maybe over exposing or not developing long enough. I've developed for 24 hours with a stubborn print to end up with a fab print. When your testing change one variable at a time, gum is fickle and if you don't you'll find it very difficult to find your problem. Maybe list in detail your work process including method of stretching, sizing, coating method, gum recipe, paint (inc manufacturer) method and time of development and how the neg was made. Maybe the gum exporters including Chris, Katharine and Judy could chime in. John. -----Original Message----- From: Laura Valentino [mailto:laura@this.is] Sent: 12 August 2008 00:56 To: alt-photo-process-l@usask.ca Subject: Re: How many layers of gum is too many? The other day I did a couple attempts where the color just stuck to the paper. I really had to attack the paper with a brush during developing just to get any image at all. I had done curve tests, so I think it must be something about how I applied the emulsion, or the consistency, or amount of pigment, or the consistency of the sizing, or...? I did try the same neg on another paper, and had pretty good results. I'm switching papers for now! Something that happened tonight was the emulsion got very bubbly. I thought it might be a cool effect, since the image is supposed to represent water, but I discovered that you can have too many bubbles. The areas with too many bubbles just flake off. Is it my imagination, or do some pigments bubble more than others? This was Payne's gray. I did use your suggestion once tonight...I got some streaks I didn't like in the coating, so I washed it right off. Laura So maybe it's a > Hi Laura > > It will still brush off after exposure. The emulsion is very fragile. > > Leave the work you have an issue with and do a test or two, that should > reassure you. > > What issues are you having? > > John. > > -----Original Message----- > From: Laura Valentino [mailto:laura@this.is] > Sent: 11 August 2008 21:32 > To: alt-photo-process-l@usask.ca > Subject: Re: How many layers of gum is too many? > > Thanks, good to know. > > Unfortunately, I usually only have issues *after* exposure... > > john@johnbrewerphotography.com wrote: >> Hi Laura >> >> If you stretched and sized your paper another layer will be fine. I've > made >> prints with up to nine layers. If you have an issue with the fourth layer >> you can always wash it off with a hose or brush. >> >> John. >> >> -----Original Message----- >> From: Laura Valentino [mailto:laura@this.is] >> Sent: 11 August 2008 20:01 >> To: alt-photo-process-l@usask.ca >> Subject: How many layers of gum is too many? >> >> I've done 3, but I really think it needs one more. Scary, 'cause it >> looks pretty good so far. Will something happen if there are too many >> layers? >> >> Laura >> >> >> No virus found in this incoming message. >> Checked by AVG - http://www.avg.com >> Version: 8.0.138 / Virus Database: 270.6.0/1604 - Release Date: 8/11/2008 >> 5:50 AM >> >> > > > > No virus found in this incoming message. > Checked by AVG - http://www.avg.com > Version: 8.0.138 / Virus Database: 270.6.0/1604 - Release Date: 8/11/2008 > 5:50 AM > > No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.6.0/1604 - Release Date: 8/11/2008 5:50 AM No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.6.0/1604 - Release Date: 8/11/2008 5:50 AM
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