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repelled the water, the uncovered surfaces soaked up thewater. An ink roller passed over the stone depositingink only on the drawn design, for the water in the stonerepelled it at other places. The process was completed by placing a piece of paperover the stone and applying pressure. Lithography has seen many improvements and devel-opments. Modern lithography and its step-child, offsetprinting, through the use of the camera and the substitu-tion of zinc and aluminum for the heavy stones, havemade enormous advances and only in principle resemblethe original process developed by Senefelder. Lithography offered a reasonable and very satisfactorysubstitute for the line-engraved steel-plate process. Theintricate designs that characterize much steel-plate workcould be drawn in detail on the stones to reproduce inclearest detail. The only element lacking was, of course,that the lithographed article presented a perfectly flatsurface and, thus, lacked the depth of tone the steelengraving produced. |
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