Show mio romic WORK b sol something methin about he various iro fro besses now employed the most moat common forms of cepro art nowadays a are those bated on photography and it may not be generally known that the most ex concern in the it he country that nat is devoted to this kind bind of work is housed in brooklyn the company who rho controls these works and gives employment to a considerable iiara quint berof ber of operatives bamo bomo of are to be regarded as artists rather than mechanics for into the finish finishing and ingland printing of the plates as we well as aa 5 skill ill must enter the tee house of goupil in paris has until recent years yean on en joyed almost a mono monopoly wooly of photo gravure Kra vure and its work has celebrity for or strength and clearcia clear cle arries cea the I 1 process is a secret but 15 i is evident from the great angan of time taken to creps preps prepare e la plate and from the appearance app 0 of sundry lines and markings marking that would not commonly show in a solar print irist that hand work is nearly a os is important a factor as c chemical eye evo I 1 ution the company here bore in brook beok lyn yn fini finishes ablate in as aa many habus as aa d days aro are taken a con batho the goupil firm an and d the results are arem W many jul instances dinces sur advances in the thear art tare are stil still F to bw bo made but there is a brood brand foundation oun dation to work upwards frob there are ara dozens of name for what is substantially the samel samel pro cosi cess the moss ty ype a licht druk balilo lello type carbon print auto glyph ives lea process proc BBB Moi maisenbach Meise ubach process photo choto lithograph photo caustic print photo go gelatine latine print photo engrav ing ng zinc etching and photogravure the action ot of light on sensitized relation Re latine or other material is the ool oa naion casion of all these forma Gold gelatine tine if a mada sensitive by treat treatment men t wi with ili liebro mato of potash which likewise renders it insoluble by water and abd in this condition it will take grease when ben that is applied but when a gela tine ine sheet is placed under a photographic gra chic negative the effect of ight t striking itri king through lassis to close t he paros of the gelatine and harden haidon it t and where light does doe snot ab nb act the after ge gelatine atine becomes soft ana absorbent after the sheet has received the tha im press crebs from the negative a grease ink will adhere to the hard bard port portions ious while the sponge areas bebok kept moist with water refuse it you yon ap ily your ink lay it 11 piece aj of kapr on it r stamp it the ink co duew off on aba th caper ambr and therbia your picture ire a heliotype lelio elio type in ia commy commercial cial phrase APPLIED TO STONE this process proc eba is much the same earne BI ai lithography but the lithographic stone holds grease only anly where chere are decided lines while gelatine gel atins tho the impress of a hundred gradations of light ight and shade photography is ap iliria to stone printing where anything is to be represented by clean le masses of black and while and it is therefore ber eore ruseti for e copying 0 1 1 I 1 n g n maps plans tracings ink d drawings r ily w i u irs du signs m miniature inia ture calendars papers and catalogues cataloguer catal line engar Tioga autograph letters and so soon on in ina that case cam i paper coated with geladino ge latino is printed on by a negative as in the cases of an ordinary photograph and tho the grease taking lines are tra transfer red bo bodily dily to the stone when the ink lines are transferred fa zino zinc in in stead of stone and the exposed por per eions of the mental era are oaten eaten down by ii acid leaving the lines in ia relief a plate is roads made that abat is similar to a stereotype and this form is ia colimon common ly used for cheap illustrations in d daily ai ly papers A plaster cast maybe may be taken from a golat gelatine inQ impresa ir i aprem after the lines have sor set anil and from this may be ba made a metal plate that will print what bat are called photo engravings for a photogravure get gelatine atine is mixed with sand or emery dust the picture is thrown on it from a negative the grea goense grense lines barden the light por portions tr ions are swollen with water and a copper shell i is deposited ou it as an an electrotype the sand gives a grain rain to toche the surface and holds the inow ink chyra h ore it is desirably desirable to impart tint in the bands of a skillful printer a proof photogravure can be made algoet as aa strong as an a elchin lebin gand it is ia easy to wipe outtie out the high lights until they are re represented presen led by the actual whiteness of the paper that receives the tha print and masses of shadow are obtainable by leaving flim of indof ink of I 1 less e 0 or greater density on the metal an burlace sur r a lace a c er brooklyn 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