Instant Old Age
To the Editor:
I've been engaged lately in
extensive English Tudor exteriors,
involving much copper trim and
finish, gutters, conductors, valleys
scuppers, etc. Can you recommend
someone who makes an application
to accelerate the 20-year patina aging
process? I've been told there is a
chemical, which when brushed or
sprayed, will produce that even patina
finish in 2 to 3 weeks.
Joseph McGrath
Holliston, Mass.
According to Paul Anderson at the
Copper Development Association, the
natural patina process in copper takes
from 7 to 15 years depending largely on
the type and level of impurities in the
air. There are three different chemical
treatments that will accelerate the patina
process. Each treatment gives a
somewhat different hue, and none is
recommended