[Alt-photo] Gum Print on Wood
keith.gerling at gmail.com
Sun Jan 29 21:42:02 UTC 2017
I think I'm the author of the piece you reference in the James book . I
would never be so bold as to predict success or failure when printing with
Gum, but I don't think your "Few Ideas" will would work in MY studio. I
mention MY studio, because I watched Attardi's video and while HE was
successful, I certainly was not). If I were to try to replicate a black on
red print on wood, I would start by using the process I describe in James,
then apply one or two red gum bicarbonate layers followed by the black.
Hope this helps.
On Sun, Jan 29, 2017 at 2:39 PM, BJ68 via Alt-photo-process-list <
alt-photo-process-list at lists.altphotolist.org> wrote:
> Dear List,
> since a few months I tried gum printing on wood like the artist Massimo
> Attardi http://www.co-mag.net/2007/massimo-attardi-bichromate-gum/ 10
> years ago.
> There is a video of one of his trials: https://www.youtube.com/watch?
> My last experiments are not so successful:
> The right picture:
> Material: Plywood (DIN A3)
> Priming: Bright red watercolor
> After drying surface was rough....
> Black Mixture: a) 1 g 780 Ivory Black Schmincke Watercolour + 12 ml
> Gum-Solution + 12 ml saturated Potassium dichromate solution
> Tried to coat the board, but color covering was bad....so I add to the
> rest of the mixture approximately 0.6 g more watercolor and got a good
> Exposure 8 min
> Wash: 16 min
> Then brushed with soft brush.
> The left picture:
> Same material, but priming with Liquitex Gloss Medium & Varnish
> https://www.liquitex.com/glossmediumvarnish/ plus bright red acrylic
> Sizing: 3% gelatin solution hardened with 2.5 glutaraldehyde solution (100
> ml + 1 ml), dried o.n.
> Coating: 1 g 780 Ivory Black Schmincke Watercolour + 3 ml Gum-Solution +
> 4.5 ml saturated Potassium dichromate solution
> Not so good covering
> Exposure 8 min UV
> Wash: 5 min
> Then brushed with soft brush and soft strokes.
> Few ideas:
> a) Acrylic Gesso https://en.wikipedia.org/wiki/Gesso#Acrylic_.22gesso.22
> from Boesner http://www.boesner.ch/shop/farben/malhilfsmittel/fuer-
> farben/gesso-1#708574 combined with marble powder and water (1:1:1
> mentioned in James Book of Alternative photographic processes) where the
> marble powder is replaced with bright red pigment or acrylic/water color
> b) Gelatin solution with glutaraldehyde solution plus bright red pigment
> applied on the raw surface of the wooden board.
> Other suggestions and experience gladly welcome...
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