Polished Metals Limited Finish Line:
M21 SMOOTH SPECULAR - Cutting with aluminum oxide
compounds, starting with relatively coarse grits and finishing
with 320 grit, using a peripheral wheel speed of 6,000 FPM.
followed by buffing with aluminum oxide buffing compounds
using a peripheral wheel speed of 7,000 FPM.
M22 SPECULAR - Cutting with compounds as for the M21
Finish, followed by a final light buffing.
M31 FINE SATIN - Wheel or belt polishing with aluminum
oxide or silicon carbide abrasives of 180- 240 grit, using a
peripheral speed of 6,000 FPM.
M32 MEDIUM SATIN - Same as above, however, abrasives of
120-180 grit are used.
M33 COARSE SATIN - Same as above, however, abrasives of
180-120 grit are used.
#3 FINISH - A polished obtained by finishing with an
approximately 100 grit abrasive, generally used as a
#4 FINISH - General purpose, bright finish, with a 150-240
mesh abrasive, following initial grinding with coarser
#4 NON-DIRECTIONAL SATIN - 80 - 150 grit with no grain
#4 LONG GRAIN - Elongated continuous grain.
#6 FINISH - A soft satin finish, with lower reflectivity
than the #4 finish. It is produced by Tampico like brushing
the #4 finish, using a medium abrasive with oil (when
#6 FINISH MIRROR BRITE - A highly finished product produced
by buffing a surface which has been finely ground. Grit lines
produced are heavier than a #7 finish.
#7 FINISH - A highly reflective finish produced by buffing
a surface which has first been finely ground, but grit lines
are not removed through the final buffing process.
#8 FINISH - The most reflective finish commonly produced.
It is obtained by polishing with successively finer abrasives,
then buffing with a very fine buffing compound. The surface is
essentially free of grit line, though a certain angles some
are still visible.
#8 ARCHITECTURAL - Same as above, but through a programmed
process each sheet receives additional color buffing to
achieve greater reflectivity.
#12 NON-DIRECTIONAL MIRROR* - A perfect mirror. No grain