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Re: Purchase of gum arabic
Yes, we made some tests some years ago. The gum solution was dark as
strong coffee, like espresso ristretto. This gum we bought readymade
in solution from a graphic shop. We then notized a difference when
printing 5-7 layers (four colour gums from separation negs) and did
no further printing using this gum. Now we have thrown it away. We
use the lumps because it's a feeling working from scratch....
Hans & Chia
>On Tue, 14 May 2002, Hans Nohlberg wrote:
>> ... Some gums gave a very dark
>> solution (even if the lumps were clear).
>Hi Hans... Did you ever test the dark vs. the light gum arabic with
>pigment or paint? I haven't found any correlation between darkness of the
>gum arabic and the quality of its printing, or even the color.
>My darkest gum (Daniel Smith lithographers') and my lightest gum (Winsor
>Newton -- at something like 78 times the price) seem to print about the
>same tone even of the lightest yellow.
>It may be different however when you're starting with the dry gum -- as we
>know, even the container is a variable in gum printing.
Chia N-Löfqvist & Hans Nohlberg
SE-412 53 Göteborg
(Besök/visit Hedåsgatan 6)