654321
20.78T20oxidized, heavilyCopper
10.88Toxidized to black-
ness
Copper
10.02T50–100polishedCopper
20.03T100polishedCopper
40.03T27polished, com-
mercial
Copper
40.015T22polished, mechan-
ical
Copper
40.008T22pure, carefully
prepared surface
Copper
40.07T27scrapedCopper
10.84TpowderCopper dioxide
10.70Tred, powderCopper oxide
10.89TEbonite
10.85T80coarseEmery
10.9T20Enamel
10.85–0.95T20lacquerEnamel
60.85SW20hard, untreatedFiber board
90.88LW70masoniteFiber board
90.75SW70masoniteFiber board
90.89LW70particle boardFiber board
90.77SW70particle boardFiber board
60.85SW20porous, untreat-
ed
Fiber board
10.018T130polishedGold
10.02–0.03T200–600polished, careful-
ly
Gold
20.02T100polished, highlyGold
20.2 – Tables
Publ. No. 1 557 536 Rev. a35 – ENGLISH (EN) – January 20, 2004 107