In a message dated 6/4/06 3:26:05 pm, TERRYAKING@aol.com writes:
> I realise that I did not intend to say 'too much gum', what I should have
> said was too much dichromate and/or 'gum that is too thin'. Alternatively, you
> are leaving the mixtures to stand longer than I would. There are lots of
> variables.
>
Chris
A variation on the phenomenon you have noticed is that when I wash the plate
after mixing the coating, the orange dichromate washes out of the gum first
leaving the gum/pigment mixture on the plate. This reflects what I said earlier,
that the gum is porous. That is why the lighter dichromate solution sinks to
the bottom.
Terry
Terry King FRPS
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Received on Thu Apr 6 10:17:37 2006
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