(57) Basic pictorial content is provided on a uniform dark (e.g. black) coloured varnish
surface of a support board 10 by application of a lighter (e.g. white) coloured base
layer 12. It is important that the surface of the board 10 should be embossed so as
to have a grained appearance, preferably resembling leather. Translucent colour washes
20,30,40 50(e.g. red, blue, yellow) are subsequently applied over all or only part
of the board surface for the purpose of colouring in the plain base layer in any manner
desired by the end user. No great care is required in application of these colour
washes; it is expected that they will overlap onto the remaining dark varnish coating,
but due to the dark, glossy and grained nature of this area the regions covered by
the washes and particularly their edges are not visible. Moreover, as the surface
is glossy and does not immediately absorb the wash errors can readily be put right.
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