Honolulu star-bulletin. [volume] (Honolulu [Oahu, Hawaii]) 1912-2010, 1915-12-09
CHAPTER xxi.
WHAT KIND OF ENGRAvINGs ARE THEREq

OF engraving plates the zinc etched is the simplest The
hatone made in the way except that with the
there between the copy and the senszd metal
plate This sensitized plate like Photographic film, simply
records the copy which in the of zinc is simply
black and whte-such crayon drawing penand-ink
white Such arwork in general is classed lne drawing
Since the sznc making process used screen such
the haone Does the reproduce photographs Yet
the very smallest black white type matter for instance
be infinitely reproduced zinc etching. If photo
graphic subject something of that kind has to be put into
engraving then the copy first be changed into
the plain backandwhe by being made into pen-and
ing line drawing Naturally plain zinc etchings rule
the best for newspaper impression because they do not have
to depend upon the smooness of the stock for faithful i'm
preston. -
Sometimes if you want either unusually sharp repro
duction else reproduction which obviously different
you may want to if the subject
to be treated engine other mechanical work
Such wood quite like etchng except that they
wood instead of metal They be carved by hand
rather than etched out by acid The original wood cut itself
is seldom used Duplicates made this original pat
plate So when it the final printing the wood
cuts likeness put the paper through the Intermediary OF
etched metal which simply duplicate OF the wood en-
craving.
lar of "cuts They neither original haftones zinc
etchngs They simply carbon copies it weresmpyl
duplicates. These elecros made by taking Inn
preston of the original printing plate whether be haone
zinc Through chemical process the resultant mold be
surfaced with shell of copper This shell of copper
then stened by being backed with lead The result is com
plete electrotype.
You can readily tell an eectrotype from the zinc pattern
plate the fact that the elecotype has copper face YOU
readily tell elecrotype duplicate of original half
tone pattern plate by the fact that the electro has copper
face but of eadke metal beneath that whereas the half
tone is copper clear through.
When necessary quickly to duplicate type matter and
plates such used the newspapers the sereopng
process is used This that bloter-ke substance,
called matrx is pressed down the surface Of the metal
FORM which combines composition and cuts As result there
impression this botter-ike substancehe "matrix
lead is poured over this marx It. of course conforms to
its bloter-ke mold 1.-THE matrix which simply impress
taken from the original ypeorm This lead thus cast
this matrx mold becomes stereotype This is solid
plate usually of lead whose surface absolute duplicate
of the original composition and cuts
Sereotpes used in newspapers because the printing
speed necessarily demands rotary press On revovngt
press would be impossible to assembled form OF in
dvdua type and plates No matter how well locked together
such might be- they would fly apart when running at the rate
of speed necessary the publication of big newspaper Sol
is necessary to make each page big eaden cylinder
Hence, the stereotype process ,=s