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Re: Very Good But.

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Posted by Al Misiuk on February 10, 2001 03:30:45 UTC

HI RICK,
WE HAVE A DUAL-BEAM PERKIN AND ELMER
THAT IS CALIBRATED BEFORE EVERY USE. THE DIFFERENCE IS NOTED THROUGH OUR COMPUTER SOFTWARE
AND WHEN THE MACHINE IS RUN ITS REFERENCED
AGAINST THE OTHER BEAM. OF COURSE WE CAN'T FIT
ANYTHING LARGER THAN 2" x2". A SLIDE SAMPLE IS
RUN ALONG SIDE ANY OTHER SUBSTRATE AND THEN TESTED. YOU DON'T NEED 40 LAYERS TO ACHIEVE
98 % REFLECTANCE IT CAN BE ACHIEVED WITH ABOUT
27 LAYERS. I'M LAZY. I RATHER ENHANCE EITHER
SILVER OR ALUMINUM WITH ABOUT 7-11 LAYERS OF
THE PROPER MATERIALS.IN THE LAST 2 YEARS I
MAY HAVE TESTED ABOUT 50 DIFFERENT MATERIALS. THERE IS ABOUT 6 THAT I'M FOND OF.

AL

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