Re: Tri-Curious Seeks Other Tri-Quad Curious Gummists
Hi Susan, Opacity is definitely a quality that is important in gum. Settling pigments like cerulean less so, as the pigment is suspended in gum arabic. Staining even less so for the same reason that it is suspended in gum arabic and thus a pigment that stains in watercolor may (or may not) stain in gum printing. With adequate sizing, the issue is usually taken care of quite nicely. That said, I have printed cerulean in the past and seem to remember its heavier type settling in the texture of the paper more than other pigment, though. And an opaque pigment as a first layer laid down is fine--for instance, cadmium yellow as a first layer, or cadmium red. I don't use cad red or yellow as subsequent layers because they look yukky on top. AND, a staining pigment like the vat colors will stain very much with no sizing or gum layer to prevent it from sinking in the paper...I like Keith's method of using staining colors last... You are absolutely right that buying a watercolor book is a good idea--I have Hilary Page's and Wilcox's two. Chris ----- Original Message Follows ----- From: SusanV <susanvoss3@gmail.com> To: alt-photo-process-l@usask.ca Subject: Re: Tri-Curious Seeks Other Tri-Quad Curious Gummists Date: Mon, 29 Jan 2007 13:11:52 -0500 >I have no experience with gums yet ( although I DID just >order Christina's book, which I'm very excited about! ). I >do however, have 30 years experience as a painter, >including using watercolor pigments with all their >wonderful and varied quirks. Do you gum-folk distinguish >between more and less opaque pigments, staining pigments, >settling pigments ( like cerulean), etc? > >It seems like understanding those characteristics would be >very important to controlling as many variables as possible >in a less-than-predictable medium such as gum printing. Of >course trial and error can be fun to a degree, and >sometimes lead to wonderful accidents :o) > >I would think that, for someone starting out gumming a good >basic book on watercolor painting might be a valuable >resource. Just a thought. I have those sometimes. > >cheeps, >susan >www.dalyvoss.com > > > > > > >On 1/29/07, Michael Koch-Schulte <mkochsch@shaw.ca> wrote: >> Molto buon. Lavoro eccellente. Grazie Damiano. Da 8 >> strati faccia questa media che ogni piastra di CMYK è >> stata stampata due volte? Aerografo? È quello che cosa >> conosco come airbrush? Come utilizzate il airbrush? ~m >> (By 8 layer do you mena each CMYK plate was printed >> twice.? Aerograph? Is that what I know as an airbrush?) >> ~m >> ----- Original Message ----- >> From: "Damiano Bianca" <damiano.bianca@gmail.com> >> To: <alt-photo-process-l@usask.ca> >> Sent: Monday, January 29, 2007 2:47 AM >> Subject: Re: Tri-Curious Seeks Other Tri-Quad Curious >>Gummists >> >> > Hi, here one quad gum, coming from a b&W film 135 mm. >> > The color selection is made by aerograph during >> > development. 8 layer cmyk. >> > >http://www.damianobianca.it/curricula/mostre/esercizi/Gizzi_C.jpg >> > I promise that i will not do anymore. >> > >> > damiano >> > >> > >> > >> > 2007/1/29, Judy Seigel <jseigel@panix.com>: >> > >> > ......... >> > >> > > Most of my own gum printing has been from black and >> white negatives, which >> > > I render sometimes in monochrome, but more often in >> *fake* real color, ........... >> >> > > >-- >Susan Daly Voss >www.dalyvoss.com Assistant Professor of Photography Photography Option Coordinator Montana State University College of Arts and Architecture Department of Media and Theatre Arts, Room 220 P.O. Box 173350 Bozeman, MT 59717-3350 Tel (406) 994 6219 CZAphotography.com
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