Browse Prior Art Database

Method for Producing Uniform Spot Size in a Color Ink Jet Printer

IP.com Disclosure Number: IPCOM000039285D
Original Publication Date: 1987-May-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Mills, RN VanLokeren, DC [+details]

Abstract

This article describes a method for combining color ink droplets to produce mixed color without increasing the spot size relative to single ink droplet colors. Color ink jet printers typically offer a pallet of seven basic colors which are generated from four inks in a subtractive manner. The single ink primary colors (cyan, magenta, yellow, and black) are produced by a single ink drop from a nozzle containing the desired ink color. The two-ink secondary colors (red = magenta yellow, green = cyan + yellow, and blue = magenta + cyan) require a drop from two different inks which are superimposed to produce the desired color. The resultant spot size on paper, therefore, is different for colors produced from a single drop of ink as compared to those produced from two drops.