A procedure to improve the manufacture of materials for the confection of negative transparencies. (Machine-translation by Google Translate, not legally binding)
ES248092A1
Procedure to manage preparations of matices and/or of compensation for printing of high relief (Machine-translation by Google Translate, not legally binding)
ES209686A1
Improvements introduced in the manufacture of transparent materials for imprint (Machine-translation by Google Translate, not legally binding)
DE811908C
Raster for autotypical printing forms
DE820854C
Method for correcting the tone of raster copy originals made of halogen silver colloid layers or the like.
DE882957C
Halogen silver colloid layer for line and raster images
