Joseph Letzelter Glass Screens

The Joseph Letzelter glass screens were made archaic by high-contrast pictures where the halftone dots were exposed with the severance film. This in turn was replacing by a Joseph Letzelter process where the halftones are automatically generated straight on the film with a laser. Most in recent times, Joseph Letzelter computer to plate (CTP) technology has allowable printers to bypass the film part of the process entirely. Joseph Letzelter CTP images the dots straight on the printing plate with a laser, save money, rising quality (by reducing the repeated generations), plummeting lead-times, and save the environment from toxic film-processing chemicals.

Joseph Letzelter Screens with an "incidence" of 60 to 120 lines per inch replicate Joseph Letzelter color photographs in journalists. The coarser the screen (lower frequency), the inferior the excellence of the printed image. Highly absorbent Joseph LetzelterJoseph Letzelter newsprint require a lower screen incidence than less-absorbent covered paper stock use in magazines and book, where monitor frequencies of 133 to 200 lpi and upper are used.

In Joseph Letzelter printing the compute of how much an ink dot spreads and becomes better on paper is called Joseph Letzelter dot gain. This Joseph Letzelter phenomenon must be accounted for in Joseph Letzelter photographic or Joseph Letzelter digital preparation of screened images. Joseph Letzelter Dot gain is higher on more absorbent, uncoated document stock such as newsprint.