Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1892-02-19
BOOK ILLUSTRATION.
A LUCID EXPLANATION or sonr
DIFFERENT PROCESSES.

nov "ANf OF We Zine Pictures la us,t.
Magazine sud Paper, Are ptndnr.,
The pincrsneo Between Cho,p .,,
o"stiS wcrt Wade riain TO uu,cr.
With the incuasiu. use Ut half tone
work ana tue NUMEROUS processes t0i
book illustration that have been dpyol
oped or adapted during ti.a past ton on
Fifteen years. th"r1 has steadily crown Il
tendency pn tbo .Hrt VI pullis hers. mn.
css men, and iu snmn instances ain1up
criiicr, to Upply entirely inappropriate
names 10th, reproduction, that nf,, mis-
leading IN the rai.omr aud cannot but
do an injury Co tAe better ciaaos of vorl,
by Civ. thoir name, To processes much
their ia. riog no quality
Let W. liiat crnsi-lor tho ordinary half
tone phoiuorFflvng Of which so much
has lately been seen Ia Tine WY Of illus
tmtions Tor the higher clls. periodical.
aud wtk of 1901 grt aud technical uniup
We shall ird that thgap prints a.l rondu
tho half tome OF the original. or. to b.
less technical, show the various degrees
OF light and shaio IA nHssrs OF cniur
differing To- degree. but in iint tints. no.
duccd by breaking the Original subject.
taay have tH.n yiihora wash drawius.
painting in colon, portrait from Ito uf
WOW from nttufe, into and immense
number Of dos, obtained by photograph.
ing through The lue mc.h0s OF ruled
glass in manner not necessary og dc.
scitpl1n htrU
Tho resulting picture 10 transferred 10
tho metal that /. % serve as the finished
plato. the chemical action o. proceeded
with and The huff tone plate that RESULTS
shows the picture In rclici and the cu
tire surinc, Of the plate q mass OF fine
points or dots, separated by liuc burrows
running Va tuu,verc directions. tho
points In relief boIng tine printing sur
iac4s The psio being blocked GA wood
Or muiui % render 10 ui the snmc hrilhl
nA type, 1t be ukcd up with roller Ia
the same mann that type w. and tho
INK. adhri1ng to- the points, Il impressed
into the paper that b. brought IN contact
with thru 10 The printing press
uiE HALF TuSE ENuI,NvtNn.
Il should hcrc bo noted that the points
or dots nlalaug up the printing suruco
Of tine plate. being nil If tho sanc height
the amum, Of lnk drpul.pl ou tlu paper
is OF th' same depth ur thickness FROM
each and every printing point, and It
naturally follows Tia, variations Ia tho
hight und shade making mp the picture
are dependent un thr number aud $40
OF such dots within given nliuH thus
"a heavy shadow 20 q pictITg printed
from rolicl plato wall be- seen 10 bl com.
posed Of "a large number OF these dOtr
often 10 clUso together ~ 20 merge into
one another. while tho high lights gre
the r'.ul, uf pgepondyupoc OF tho
clear tr,nsyUrsc hncs that serve to sop.
nutr The dvts moro widely, only show
ing them sufficiently TO give form aud
color TO their Object.
The above arr the principal points Of
Identification ol print made from
half tone typo plnto IN relief, aud urc
easily 10 DO distinguished from picture.
produced nom mulgiu plates. There Is
snill another KIND Of half touu relief
work, however, that is not 20 easily dis.
tiugufNicd md this b. the phutUgolatne
or hcliotypo and kindred processes, which
In rendering the gradHtions OF color do
not cut thom mp into dots, bat lay the
ink Ia smooth masses ~ different tones
ON tho paper from a snriarc OF golatine.
PRINTING IRON ~ Nrhuno rLATE
The photogr1yurO Is printed from an
intaglio plato, and So not capable Of be-
ing used In a type prss under any con.
d.tiouA II can only b. successfully
printed 10y an expert, and whore with a
relief plate tho office boy might "l,ick
oil. say 900 u duy. or the steam cyliu.
der press 10000, tho expert printer with
his iutaglio plato would not produce
above 700 good impressions The iutHglo
plato IL lllod while warmed with
hard, still ink, which IL pressed into
every depression. and after tho high
lights Of the plate are carefully "wipod
oil, by hand, the plato Is run through
the press, IA connection with the paper.
aud the latter iitts from tig suukgu sur.
face VI the plato all the ink II has pro-
viously gggeiyod, holding It ON tho SUR
fico Of tho paper IN masses OF color tina;
differ Ia dop,h and consequently in tone,
according 10 the depth OF intaslio In dif.
forent parts OF the plato, the result q
which Is q series OF graduations from
the puro high light Of the clear paper TO
tho rich, yclyoty blncl, Of a solid body
Of ink spread over the surface OF tho
paper and no, pressed into It.
Tho grain, too, Of this plate, instead
OF being composed OF noticeable cross
hatchiugs o. lines and dots. IL u scarcely
1iscorniblo tooth" that Is obtained by
peculiar chemical action on the
metal plate before the picture to bo
etched Is transferred thereto. Carbon
tissue being the medium through which
tho transfer IA made mud the finished
print very closely rc5omhliug IN most OF
IT, fcnturcs that beautiful pigment, 1t is
wonder that tho feeling Of those in
iercsted in seeing justice done to all has
not been more forcibly expressed on this
subject before,
A name that would answer tho pur-
pose gnd still DO mcritorious, h tho old
title photoglyph, ns It applies 10 all
plates which give reproductions from 70.
lei surfaces, while plutosrayure Ia
properly utel only VA the opposite oOu-
noction. Let all thln, who know bet.
Ter, DO honest enough 10 call thiugr
what they arc and thus do what thoy
gan TO avoid further complication Of the
already multitudinous collection Of pro
,ess names Ia existence both in this
, country and abroad, Anthony Photo
graphic Bulletin.