Re: [Marbling] grainy watercolours
- I wouldn't be surprised if it were oxgall contamination on the surface of
the size. Always skim thoroughly between each sheet. Not all gouache
colours work in the marbling process. I have a big box of gouache colours
that were unsatisfactory.
Sometimes a little extra water in a colour will rectify it. A lot of trial
At 11:02 AM 7/02/2003 +0000, you wrote:
>All,[Non-text portions of this message have been removed]
>Grainy colours are still an unsolved riddle to me. I use gouache +
>water + ox gall as colours on carrageen, and very often it works
>fine. Sometimes after the first comb / rake I can see that one or
>some colours start to become grainy, seem to tend to aggregate more
>into drop shapes rather than lines, show flake like appearance on
>bigger surfaces. I have uploaded a file grainy.jpg as extreme
>example. This happens to colours that have worked fine just a sheet
>before. Suspicions I have are a) this happens more to colours that
>contain of more than one pigment, b) it is a combination of colours
>that triggers this effect. Nevertheless, this is something I cannot
>grab, fix, explain or avoid, but would very much appreciate the
>comments and explanations of you experienced marblers. Thank you.
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