In a message dated 20/03/2006 19:37:56 GMT Standard Time,
kthayer@pacifier.com writes:
If more pigment makes the gum less
insoluble, it's hard to see why you'd need to reduce the exposure
when adding more pigment.
Katharine
Katherine
It is one of the most basic principles of gum printing that building
contrast with multiple exposures requires control of both the amount of pigment and
the length of the exposure.
This is explained in more detail in the article on my web site.
Terry
Terry King FRPS
RPS Historical Group (Chairman)
_www.hands-on-pictures.com/_ (http://www.hands-on-pictures.com/)
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1. An excellent thing is as rare as it is difficult.(Spinoza)
2. A man's reach should be beyond his grasp or what's a heaven
for.(Browning)
3. Frustra fit per plura quod potest fieri per pauciora.(Occam's razor or
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4. Nullius in Verba (Horace), 'Take no man's word for it' (motto of the
Royal Society).
5. If ignorance is bliss, why are not more people happy ? (anon)
Received on Tue Mar 21 03:29:04 2006
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