David.Clark@Walsworth.com
Date: 02/01/00-09:13:13 AM Z
Several mwmbers have correctly identified the problem as Newton rings on the
scanner.
This is confusing for many people because Newton rings look like the patterns in
moire silk. Like oil on water.
What we printers call moire is more of a plaid or mottled appearance. The two
names are confusing.
Putting the negative in oil is a good solution for drum scanners, but for
consumer grade flatbed scanners it is overkill. They do not focus that well in
the best of cases. A more practical solution is to make a negative carrier with
a hole for the negative which covers the whole flatbed. You need to eliminate
the extra light from the transparency adapter anyway, and the focus is close
enough. It will prevent direct contact with both glass surfaces, and prevent
the Newton rings.
Putting oils on a flatbed scanner will give you one heck of a cleanup problem,
and you need to be careful to not get any cleaning fluid around the edges or it
can loosen the glass.
David
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