BEADING.
A greasy
surface repels water and aqueous preparations by
reducing them to droplets. This beading will occur if,
for example, a copper plate which has not been cleaned
properly is covered with Indian ink.
BED (OF PRESS).
Part of a press on which the plate or block
rests during printing. In a lithographic press, the bed
is a mobile element which transports stone to a position
beneath the scraper or roller.
BEVELLING.
The edges of intaglio plates are bevelled to
ensure that they do not cut the paper in the press. A
true bevel is only necessary if the plate is more than a
millimeter thick, otherwise a light rounding off is
sufficient.
BITING.
The process of (1) corroding a design on a
metal plate in either intaglio (e.g. etching) or relief
(e.g. line block); and (2) fixing the image on the stone
or metal plate in lithography (see: reinforcing). It is
done with a mordant: acid solution, salt (perchloride of
iron), etc.
BLANCHING.
A pale discoloration on a surface as a result
of superficial water or solvent penetration.
BLANKETS.
Blankets may be used as the packing placed
between the upper roller of the intaglio press and the
paper when printing. These are used to even out the
pressure being applied to a plate.
BLOCK.
The wooden element which is printed in making
woodcuts and wood engraving. The word also applies to
typographical printing elements.
BLURRING.
An impression will receive a blurred appearance
if the paper and the inked roller are not properly
registered during printing.
"BON A TIRER".
Literally means "Good to print:" It is
generally assigned on a trial proof by the artist when
he wishes to indicate to the professional printer that a
satisfactory state of his print has been obtained. It
gives the printer the standard to which he must adhere
in taking successive impressions.
BUCKLING.
A radical shrinkage or compression of a surface
(e.g panel painting) as a result of environmental
action. This often results in generalized lifting or
cleavage of the paint and decoration layers.
BURIN ENGRAVING.
Also known as line engraving.
BURNISHING.
The operation of smoothing out the grain in the
mezzotint process with the aid of the burnisher, a
polished steel tool with a large round head. It is also
used on metal plates where corrections are required.
BURR.
The cutting action of a tool across a metal
plate causes rough ridges known as "burr" to be thrown
up on either side of the incision. The ridges left by a
burin are quite small and are removed with the scraper;
the drypoint creates a large burr, which retains the ink
and prints an area of rich tone - the particular
characteristic of this technique. Burr is very fragile
and, unless the plate is steel-faced, will rapidly wear
away in the press. Usually lasts for only 10-20
impressions after creation. |