Re: Types of Gum? Dyes instead of pigments?
On Tue, 16 Oct 2007, Keith Gerling wrote:
Exactly. That's why they're called "dyes." They "dye" paper, but you don't dye metal or paper so easily.As for dyes, the biggest problem I've found is that they stain. Meaning that if you put some on paper, it won't wash out.
Keith www.gumphoto.com On 10/16/07, Don Sweet <firstname.lastname@example.org> wrote:This chap is experimenting to see whether the plant dyes used in anthotypes are reasonably permanent. http://www.alternativephotography.com/articles/art098.html Don Sweet ----- Original Message ----- From: "Christina Z. Anderson" <email@example.com> To: <firstname.lastname@example.org> Sent: Wednesday, October 17, 2007 2:40 AM Subject: Re: Types of Gum? Dyes instead of pigments?Nope, and nope, Jacek. However, there are a number on this list doing Temperaprint, or using gloy...and, of course, gelatin as in carbon printing. Also albumen. I don't know why plant dyes wouldn't work if they could be suspended inthegum, but you'd want to worry about archival colors. Could you test itandtell us what happens? Chris ----- Original Message ----- From: "Jacek" <email@example.com> To: <firstname.lastname@example.org> Sent: Sunday, October 14, 2007 9:13 PM Subject: Types of Gum? Dyes instead of pigments?Hi all, I was wondering if anyone used another form of a binder in GumBichromateprinting. Most of the sources I've read have all used Gum Arabic,thoughthere are many other that exist Gum tragacanth,Guar Gum, Locust BeanGum,Tara Gum, Xanthan Gum etc. Perhaps a different gum might hold more pigment or give anotheraestheticresult? Other than using watercolour pigments, has anyone tried using dyes? I presume that a pigment is a insoluble powder, when using gum andexposingto light the pigment is trapped, where a dye used perhaps the gumcan'ttrap the soluble liquid? Though is it possible to take a dye and makeitinto a pigment? Silly question perhaps? :) I had this idea to useplantdyes for my colours, wondering if its feasible or not? Cheers Jacek