LAP MATERIALS


LAP MATERIALMOH’SCOMMENTS
Ceramic9Aluminum Oxide
Anodized Aluminum6.5Electrolytic coat
Steel5 to 8.5.
Cast Iron5.
Corian4Methal methacrylate plastic
Copper3.
Zink2.5.
Plexiglass, Lucite2Acrylic Plastic
Type Metal2Lead, tin, antimony, copper
Pewter2Lead, tin and variables
Metallized Resin1.9Metal pelets in resin
Type Metal1.8Tin and variables
Tin1.7.
Mylar1.6Polyester plastic
Acetate1.6.
Lead1.5.
Polyurithane1.5.
Vinyl1.
Beeswax/carnuba0.3.
Beeswax0.2.

Note: These figures are approximate and are put together for your general reference.

The Moh’s scale is really not appropriate for metals or polymers, because it is based on what scratches what in inelastic materials.

A deformable material like metal is measured by the displacement of the metal by a diamond point or a ball, as in the Rockwell or Brinell system. Polymers are usually measured by Shore Durometer, which also measures the deflection of a point under a force.


LAP MATERIALS

Compliments ofThe International Gem Society