U of S | Mailing List Archive | alt-photo-process-l | Re: PVA size concentration for gum printing

Re: PVA size concentration for gum printing

I've even used it straight from the bottle with Fab EW paper, but it does give the print a semi-matte appearance, kind of like it's waxed and buffed.
Sometimes I'll use it on the blank paper after a presoak, and other times I like to use it AFTER the first gum layer.
Here's a tricolor where I used it after 2 layers...printed yellow, red, SIZE and then blue.
Also, don't forget that Keith Taylor prints those beautiful Decosse gums in 3 layers and NO size. There is also NO preshrink in his workflow due to the affixing of the paper onto an aluminum substrate and therefore keeping registration integrity. So, 3 baths total and no problems with stain.
My experience seems to bear this out as well (we're only talking Fab EW here, now)...my paper is preshrunk and I can do 2 layers before getting an iffy 3rd layer. That's why I've tried doing 2 layers and THEN sizng with the PVA.
----- Original Message -----
Sent: Monday, October 12, 2009 6:31 PM
Subject: PVA size concentration for gum printing

learning all the time,
I have receives some off list posts that higher Gamblin PVA concentrations work well on different papers (as high as straight from the bottle). I just re-run a test with 1:1 dilution with water on a presoaked Fabriano Artistico Xtra white. Paper was presoaked, dired and coated with 20cc PVa water 1:1 mix/sheet. The test strips are being developed but they have much less stain/faster developmet to clear the stain, then previously reported 1:2 dilution. ANd of course quick dip and dunk in a chlorox solution works miracles as well. So before you report it is total b-s, I would urge you to pre-shrink the paper and thern try different dilutions of Gamblin PVA if you are inclined to experiment. ANd every gum printer is.


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