From: Christina Z. Anderson (zphoto@montana.net)
Date: 04/14/03-08:55:12 AM Z
P.S. I agree with Katharine (not that I am an authority on this--but she
is). I think the original thread about stain was moreso that the old adage
that too much pigment stains is not *always* true, not that too little
*always* stains. In other words, with higher ratios of pigment to gum than
I was using before (3g/50ml) the dreaded stain did not appear with some
pigments even up to 6g/12 which is equivalent to 8 times what I used to
use--this on SOME pigments. I have had MEGA problems with quinacridone
violet and dioxazine purple at this strength, aside from way too brilliant
color. This is good--I just need to cut it down, then. This all on unsized
paper, so I am really giving it a chance to stain if it is going to.
I also bought some powdered gum and with that you could certainly mix
up a thicker gum arabic which may or may not be a good option (e.g. flaking
may occur). I bought the stuff because in one of the old books someone said
Demachy used really thick gum, 2 pts gum to 3 water, so I mixed it that way.
It is quite thick. Anyone use powdered gum?
On the same topic, has anyone experienced staining really bad with raw
umber? I did not think that would happen but it sure did.
And maybe I can ask this--what are people's favorite
colors--specifically paints? So far, for instance, in testing raw sienna
against gamboge, similar colors (gamboge is yellower and more brilliant and
more transparent) I would choose raw sienna because it clears very well.
Chris
> Lisa Reddig wrote:
> > I am trying to figure out how to make a really pale/light layer of color
on
> > a gum. As everyone has been saying, using too little pigment to gum
ratio
> > causes stain
>
> Hi Lisa,
> I for one have never said this, or observed it.
>
> Is there some white or clear (?)
> > pigment that can be mixed with a color to make it paler, and yet still
print
> > properly.
>
> Yes, it's called gum arabic, not to put too fine a point on it, I hope.
> You should be able to print fine with very small amounts of pigment in
> relation to gum, without any staining problem. I've deliberately
> printed images so pale, even with three coats of gum to provide depth
> and definition, that they appear just breathed onto the paper. No stain,
> but very little pigment. It works fine, trust me.
> Katharine Thayer
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