The E-Sylum:  Volume 8, Number 11, March 13, 2005, Article 9

GALVANOS AND EPOXY PATTERNS ARE LUBRICATED

Dick Johnson writes: "Michael Schmidt responded to my
item on galvanos by mentioning the U.S. Mint film showing the
Sacajawea dollar pattern on the die-engraving pantograph. I
saw that same film and recall that scene. What looked like the
destruction of the epoxy pattern was actually lubrication fluid
flowing across the face of the pattern. This is required of all
patterns – copper galvano or epoxy – to aid the trajectory of
the tracing point. Please note the headline in last week#39;s item
was incorrect: REUSING EPOXY GALVANOS. You cannot
have an "epoxy galvano." It should have read Epoxy Patterns.

Incidentally a similar lubricating fluid is played across the die
being cut. But here it has an additional job of carrying away
the minute chips of metal removed by the cutting point. The
oil keeps the die and cutting point cool, facilitates the cutting
action and collects the chips. The contaminated oil is piped
away to a collection pan. In time this pan looks like mud but
is the gray color of the steel diestock."

[I'll take responsibility for the inaccurate title. Sorry!
Thanks for setting the record straight. -Editor]

  Wayne Homren, Editor

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