A colloidal form of silica, available in the form
of pale amber colored highly absorbent granules.
and used as a dehumidifier. It is generally kept
in small cloth hags near objects on display or in
storage that are prone to cockling or other
damage. By absorbing moisture from the atmosphere.
silica gel helps prevent formation of mold,
softening of water-soluble coatings, cockling,
warping, etc. When saturated, it can he dried by
heating. Sometimes color-coded particles are added
which change color when the gel has become
saturated. It is also available in an air-floated,
extremely fine powder form that is useful for
adding slip resistance to coating, and dulling
effects to varnish and similar finishes.