No detectable functional relationship was found between dot area and dot density within a solid ink density and paper combination over a 65 to 300 line screen range.
Dot spread, measured as per cent difference from the per cent dot value of the half tone negative, was found to be more significant in the midtones and the 300 line screen was observed to increase spread appreciably as well as variability with tints.
Library of Congress Subject Headings
Photoengraving--Halftone process; Offset lithography
Covington, Walter L. and Heaps, William L., "Density variation and spread of the printed halftone dot in offset lithography" (1965). Thesis. Rochester Institute of Technology. Accessed from
RIT – Main Campus
Physical copy available from RIT's Wallace Library at TR940 .C68 1965