Re: Process Colours for Gum

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From: George Huczek (ghuczek@sk.sympatico.ca)
Date: 05/07/01-09:03:43 PM Z


At 04:34 PM 07/05/2001 +0000, Katharine Thayer wrote:
>You ask this question as if you expected there to be *an* answer to it.
>Everybody will tell you something different, I suspect. The most-often
>recommended colors are Cadmium Yellow, Alizarin Crimson, and Thalo Blue.
>I recommend against Alizarin Crimson, because even in its modern
>formulation it gets the lowest lightfast rating from every manufacturer,
>including (last I checked) W&N. Quinacridone red is more permanent and
>an acceptable process magenta. That should give you a place to start,
>anyway.
>

I don't expect to get natural, realistic colours. If I did, I'd use a more
direct process using colour film and be done with it easier and faster.

W&N rate Alizarin Crimson as "moderately durable", but not permanent, so I
have avoided it in the past for single colour gum printing. Cadmium yellow
... well, that colour will stain, so I would prefer to avoid it. And as
for the Thalo Blue, Windsor & Newton have a "Winsor Blue" in either a green
shade or a red shade that might get me close; their artists' watercolour
range does not include Thalo Blue.

With the Linel line, at least I know what the recommended process colours
are. I will try to make further inquiries from W&N.


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