Re: Watercolor pigments - pigments to avoid...

Hi Matt,
Actually, Prussian is fine for gum, so it's not the pigment itself
that's problematic, but maybe the Grumbacher paint. Grumbacher I
wouldn't recommend, as it's not really an artist quality line of
paint, and I see you are replacing yours with a better paint, which
is good. I don't know what the indigo hue would be in your case; it
is generally a blue mixed with lamp black, but the blue can be
anything from prussian to ultramarine to pthalo to cerulean. At any
rate, any of the blues will print well in gum.
Katharine

On Jul 12, 2006, at 5:57 PM, Matthew Magruder wrote:

> Katharine
> Thanks so much.
> I didnt explain more thoroughly in my first email. Im using Gum
> Bichrom as layers over pt/pd prints (mainly pd since Im just using
> the Na2 method). I found out last night, the hard way, that either
> prussian blue or indigo hue will stain. created some bad blue
> spotting. I am using the Grumbacher water color pigments. Ive
> started accumulating Winsor and Newton pigments to replace them. I
> have the grumbachers on hand as I used to dabble in watercolor
> painting along with acrylic as the mainstay.
> Ill have to continue to just explore and test. Altho the links you
> and Don provided will likely prove to be immensely helpful. Im even
> tempted to give straight gum printing a try. Although Im still just
> so much in love with the color and depth the gum layers add to the
> palladium printing Ive been doing for a while now.
>
> Thanks again.
>
> Matt
>
>
>
>
>
> On Jul 12, 2006, at 11:33 AM, Katharine Thayer wrote:
>
>
>> Hi Matt,
>> For lightfastness information on watercolor pigments, the best
>> reference, always kept current (I hope Bruce McEvoy is young and
>> keeps his interest in this project for his whole life, because I
>> don't know what the watercolor world will do when he stops keeping
>> this site, an absolute treasure trove of information about
>> watercolor pigments):
>>
>> http://handprint.com/HP/WCL/waterfs.html
>>
>> As for whether pigments are good to use in gum bichromate
>> printing, there are lots of myths, but I've used almost every
>> pigment used in watercolor paints, and have yet to find one that
>> is incompatible with the process. Each pigment has its own
>> printing characteristics, so it would be important to know what
>> your goal is with a particular printing, whether a particular
>> pigment would be able to achieve that goal or not.
>> Katharine
>>
>>
>>
>>
>> On Jul 11, 2006, at 9:22 PM, Matt Magruder wrote:
>>
>>
>>> I dont usually post on here. Mostly just read and search when I
>>> have a question.
>>>
>>> so hello and hi.
>>>
>>> Im curious if there is anywhere online or such that lists the
>>> different watercolor pigment colors and whether they are good too
>>> use in Gum Bichromate printing.
>>> IE they dont stain or whether they are lightfast or not...
>>>
>>> thanks in advance for any info.
>>>
>>> matt
>>> austin tx
>>>
>>>
>>>
>>
>>
>>
>>
>
>
Received on 07/12/06-07:43:07 PM Z