HAND-COLORING
Hand-coloured
prints have an old tradition and must be distinguished
from those printed in color (color printing). Coloring
is done in watercolor or gouache, with either a brush or
a stencil cut to allow ink through over the necessary
areas directly onto the impression (as opposed to the
block, plate, etc.).
HATCHING.
Parallel lines which are
cut close together in an engraving with the aim of
giving an effect, en masse, of a grey or dark tone. The
lines may be intersected by other parallel lines, a
technique known as cross-hatching; or they may be
over-hatched. Parallel marks made with a drypoint were
used on geographical maps to represent water.
HC (HORS DE
COMMERCE).
An impression pulled outside the edition for the
personal use of the publisher or artist.
HUMIDITY.
See also relative
humidity. The absolute humidity is the content of water
vapor in the air measured as grams per cubic meter or in
equivalent terms.
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