Portrait . istance between the screen and the plate isautomatically adjusted from the outside by means ofone single knob or micrometric screw with an indexdial recording whatever separation may be desiredbetween the plate and the screen from ~h inch to finch and with it absolute parallelism is secured. Noother holder will separate the screen from the platewith absolute equidistance and this has heretoforemilitated against the best possible work in photo-engraving. All metal parts inside this holder which are liableto come in contact with the solution are made of sterlingsilver and the wood is
Portrait . istance between the screen and the plate isautomatically adjusted from the outside by means ofone single knob or micrometric screw with an indexdial recording whatever separation may be desiredbetween the plate and the screen from ~h inch to finch and with it absolute parallelism is secured. Noother holder will separate the screen from the platewith absolute equidistance and this has heretoforemilitated against the best possible work in photo-engraving. All metal parts inside this holder which are liableto come in contact with the solution are made of sterlingsilver and the wood is covered with three coats of Jf o v t r a i t shellac. All the inside parts of the holder can bereadily removed by anyone without tools and all theparts are interchangeable. The old type of door springcommon to both the Scovill-Levy and the Anthonydesigns and all other imitations thereof is done awaywith and replaced in this holder by a spiral spring witha metal disk covered with cloth, which produces a very. Ansco Halftone Engraving Holder uniform and soft tension on the plate. The openingfor the screen and plate is square and is -re inch largerthan the dimensions given for each size holder, thusa 14 x 17 holder will take a screen 17-^- inches squareeither way or any smaller size down to 8 inches. The trough is saturated with hot parafhne to makeit more durable and is provided with a silver saving 7 r a i t receptacle constructed on new principles and locatedin a different place than heretofore, and its constructionis such that it will catch all silver drippings. Thetrough as well as the top plate rail are beveled on theirupward face to hold the ground glass securely, shouldthe operator prefer to focus with a ground glass in theholder. Both the screen and the plate are insertedfrom the rear of the holder. The difficulty existingin all holders made heretofore, in regard to the rockingand tilting of the trough and rails, has been absolutelydone away with in this holder by a new d
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Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1900, booksubjectphotography
