The Northwestern standard. [volume] (Minneapolis, Minn.) 1885-1886, 1885-11-07
PHOTO MECHANICAL.
rHE SYSTEM EXPLAINED HY ONE
OF ITS ExPoNENTss
How Art serves Commences Making Pict-
n,,eS oE puhlIc Buildings Bridges,
and Merchau,tise Tracing
Architectural Drawings.
ltAIcaen News.

A reporter was IN the boarl OF trade
building recently q ter trailing hours on
Change, and observed the taking OF SO vsral
sectional and tul-s.zsi views OF the large
trading hall by the two partners in o pho
tograrhic firm. The process was a long aud
tedious one, As tbs artists mada many et-
forts before they reached the be possible
re suits The reporter was invited TO call
AMI sac the picture WHEN finished and did
So After admitting the proofs from the
negatives he had seen taken, he entered III"
to conversation with the partners, who gave
him a large amount OF Information concern
ing their branch of the photographic art.
at is popularity ,uppo,ed, said one OF
them, that the ordinary portrait photo
grapaers who take work in our line do the
work themselye. But tll' Is a mlsconcep-
ton, as it requires special training and diff
ferent appliances to Eroduce saa llneS5 work
in our speciality.
"W hat constitutes the greatest numher OF
these special ordersa'
Our work is everything outside the orli-
nary portrait line. and even in that We do
g great deal Of enIarginy by the negative
and clnden er system. Our main Work
though is public buliing7, monuments,
bridges, interiors, npen-air views, contrac-
ton work for magazines, catai que cuts
ere made. and architectural tracings. we
are devoGiny great deal OF attention mt
present TO the perfection OF what we call
the ph to-mechanical system. by which We
viii be- able TO print photographs from
single plate as rapidly as Autographs are
now turIo ont.
@Will you please illa brate Che various
systems an uetho Is you have nlanGioned"
",pue main system is, of course. the usual
camera work on plates, more or less sensi-
TIED. but simpler proce great dssid-
era trm in our business. When We have TO
get negatives OF interiors it takes from one
and half to four minutes to get properly
toned specimen If at ali large. The III Tan
tanaons process has only been adapte TO
Sniaii work 50 far Look at this proof OF
the board Of trade hall. You vail see that
the minute han OF the clock seems to have
about Sc va. points. The points in iicate
how long the canlara was Uncovered lit was
u three AMI one quarter nnnntas AMI
lnstea lIness III the Instrument Or anything
moving i'll tie hall during that time would
have burrai and destroyed tn. negative.
Tlis viii explain the many attempts we
hal to make before Il satisfactory result
was obta ned.
1T often happens that the pest point or
view for an interior negative ii dark on
otherwise unsuitable spot when II takes
much longer and is far more troublesome.
III making open-aiI negatives it docs NOT
AXE nearly SO long. but the chances OF IN
!erruptiOn on Dlotion are SO great That we
often have t. ma la rs many attempts as
in in Ioor work. Tie work we like best. as
far as beauty of re- nit as compared with
5de amount OF work is concerned, Is nlonu-
mental AMI brid ,e work. Notice this pict-
ire we have lust printed You notice how
sharp every an sie o. the stone 5esrns-how
you can see the itg 1T as it is duly reflected
from the w lite surface. Such a picture as
this can only BE- talen uadsr the most fay-
orable circumstance With the camera
we do mo It of tns o.fi.s work. at;o. Hers is
q case Of boots AMI shoes samples for the
fall TRADE, we have bean at WORK on foryone
o. the largest 500 manufacturers in the
city Hela are the portraits. irorh which
the catalogue cuts will be uiad9
After the r porter hal admired the shoe
pictures, whieh we're really tine work, he
askel if they often had commissions at
distance from the ely.
"Oh, yes; we frequently GO long distances
Ny partner return d about lon days ago
from Hender on. KY, wner. we photo
graphed the new railway bridge tho long
est OF the kind IN the world. We have been
sent into every We tern state, an some OF
the ed tern AM nortaern ons We do not
care much for these commissions, Is we
have to take so much care OF orr lenses
while in transit.
How are those tracing OF house plan,
an machinery ma Les
"rney are done by sun photography with
out the aid OF the isns Or camera. We take
sheet oil plain White paper and coat it on
one side with ats OF iron. After it IS dry
we tack Ii on board AM over it thu
original archlssc ; design on tracing paper.
1t Is taen exp - t. tue sui and in about
ii teen mnutes tbs pencil MARKS OF the trac-
ing are tran TERED to the coated sheet and
appear in wnit9 lines, tue remaining por-
tiun turning blue, you see. From q
single tracing We cal luke any numoer OF
copies required We do a grsaG deal in the
way of eni4lging figure plotog raph, aud
views by proGe ume wat similar. After
the payer j prepared vita q secret prepara.
ton of o own, We pu6 tina small copy in
frame: at the uiddie distance we place q
ray conisn ser. ana at tue end the prepared
pa per ior tue enlarge copy. Tne Rhols is
then exposed to the III, and when Che work
is co npletei it has tae appearance OF
lght-tonet crayon portrait. These wien
touched mp with cnalks water c5lors
make aie .anE picurss Large SUNS have
been paid tor snein BY people who thought
they were genuine erayon or portrait work
fnsy can be made any sfze by iangthening
the distances between tae copy and the pre-
pared paper