FotoDave@aol.com
Date: 03/01/03-09:07:26 AM Z
Also, in general gouache is less finely ground then watercolor because
watercolor is intended to be used in transparent washes but gouache is
intended for opaque application. This I have only read from literature, but I
don't know how applicable it is in gum printing. Maybe the coarser one is
actually better for our application.
Also, I think I need to elaborate more on what I have said before (also
quoted below). When I said nowadays artist gouaches generally don't add
filler (especially white) for opacity, it doesn't mean that only pure pigment
is added in every available color. While there are more and more artists
using gouache for permanent art works, the original applications for gouache
is for making illustrations (for temporary display or for photography for
brochures, e.g.), so there are sometimes less permanent pigment or, in some
colors, dye added! One brand has a pure magenta which has magenta dye
added.... beautiful color for illustration but not permanent.
So it is always good to examine what ingredient is in a particular color for
a particular brand.
Dave S
> Hi all,
> My understanding is that gouache, or good gouache anyway, is made up of
> much more finely ground pigment - much finer ground than poster paint. This
> gives a richer, denser colour. Better quality pigments are used in gouaches
> too.
>
> cheers
> Catherine
>
>
> >> ----- Original Message -----
>> From: <A HREF="mailto:FotoDave@aol.com">FotoDave@aol.com</A>
>> To: <A HREF="mailto:alt-photo-process-l@skyway.usask.ca">alt-photo-process-l@skyway.usask.ca</A>
>> Sent: Tuesday, February 25, 2003 10:01 PM
>> Subject: Re: gum printing
>>
>>
>> Hi Judy,
>>
>> I believe long long time ago gouache and poster color were basically the
>> same thing, which was pigment with filler or white added, except that
>> gouache was a more expensive version, so it had higher pigment to filler
>> ratio.
>>
>> Then W&N changed that. They specifically say in their literature that they
>> achieve higher opacity in their gouache by using more pigment instead of
>> by adding filler. Nowadays I think most so called artist gouache are
>> without filler whereas cheaper grades (student grade or kids grade) still
>> have white or filler added.
>>
>> Dave S
>>
>>
>
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