CODE

CLASS

DESCRIPTION

CB

carbohydrates

Carbohydrates and polysaccharides such as gums, sugars, and some structurally modified cellulosics. Examples: gum tragacanth, honey, starch, cotton, viscose rayon (regenerated cellulose).

GL

glass

Glass and related materials.

MP

minerals / pigments

Natural and synthetic inorganic minerals, pigments and fillers, corrosion products and some salts of organic acids occurring as minerals.  Examples: kaolinite, malachite, cuprite, calcium oxalate.

MX

mixtures

Materials with constituents from multiple classes (such as paint films and composites), commercial products and formulations.  Examples: verdigris in linseed oil, alkyd Prussian blue, fiber glass.

NR

natural resins

Natural resins containing terpenoid, hydrocarbon and related compounds.
Examples: pine resin, mastic, bitumen / asphaltum, myrrh, amber, and natural rubber.

OD

organic dyes / pigments

Organic colorants (natural and synthetic) such as dyestuffs, pigments, and lake pigments.
Examples: alizarin, indigo, copper resinate, gamboge, Kermes lake.

OF

oils / fats

Materials containing lipids and salts of fatty acids.
Examples: walnut oil, shea butter, cupric palmitate.

PR

proteinaceous materials

Materials containing proteins.
Examples: egg, hide glue, silk, casein.

SR

synthetic resins

Chemically synthesized resins and associated additives such as plasticizers, and chemically modified cellulosics and natural resins. Examples: polyvinyl acetate, polyethylene glycol, cellulose nitrate, chlorinated rubber.

UC

unclassified materials

Materials that do not readily fall into any single class. Examples:  surfactants, organic sedimentary rocks such as coal, lignite and jet.

WX

waxes

Waxes of animal, plant and fossil origin. Examples: beeswax, carnauba wax, ceresine wax.