Ink jet printing paper

Better colour definition with colour/ink jet printing papers... 

Fluorinated surfactants are used in the manufacture of heat-sensitive recording paper [242-245] and ink-jet printing paper [246,247]. 

Humectants and low vapor pressure cosolvents are added to inhibit drying of ink in the no22les. Surfactants or cosolvents that lower surface tension are added to promote absorption of ink vehicle by the paper and to prevent bleed. For improvements in durabiUty, additional materials such as film-forming polymers have been added. Ink developments are providing ink-jet prints with improved lightfastness, waterfastness, and durabiUty. As a result, such prints are beginning to rival the quaUty of electrophotographic prints. 

Water-soluble phthalocyanine dyes may contain only sulfonic acid groups but normally contain both sulfonic acid and sulfonamido groups. They are used as direct dyes for paper and as reactive dyes for cotton. Representative examples are Cl Direct Blue 199 (38) and Cl Reactive Blue 71 (39). These dyes are also used for the ink jet printing of textiles (see Section 9.12.6.2). 

Shimoda,T. Kanbo, S. Kobayashi, H. Seki, S. Kiguchi, H. Yudasaka, I. Kimura, M. Miyashita, S. Friend, R. Burroughes, J. Towns, C. 1999. Multicolor pixel patterning of fight-emitting polymers by ink-jet printing. SID Symp. Dig. Tech. Papers 30 376-379. 

Acid Dyes. These water-soluble anionic dyes are applied to nylon, wool, silk, and modified acrylics. They are also used to some extent for paper, leather, ink-jet printing, food, and cosmetics. 

Amides of 3- or 6-hydroxy-2-naphthoic acid bearing dialkylaminoalkyl residues on the nitrogen atom lead to orange dyes for polyacrylonitrile or paper when coupled with diazotized aniline [20,21] or to red dyes, soluble in glycol ethers and useful for ink-jet printing, when coupled with diazotized 3-amino-4-methoxybenzenesulfonic acid AOV-dicthylam idc [22], and to substantive red dyes when the diazo component is a 2-(4 -aminophenyljbenzotriazole [23],... 

Until recently, the essential elements in printing were a printing plate coated with a printing ink, which was transferred to paper by or in a printing press. A recent process, ink-jet printing, invented by Richard G. Sweet in 1971, removes the need for a printing plate or a press. 

Bugner D. (2002) Papers and films for ink-jet printing. In Diamond A Weiss D (eds). Handbook of Imaging Materials, 2" Edition, Chapter 15. Marcel Dekker, New York. 

Deviations between the experimental results and the modified Lucas-Washbum capillary models demonstrate the limitations of these theories for paper structures. Moreover, as discussed above, concentration gradients will likely exist within the penetration zone during ink jet printing so that AP, the capillary pressure, is no longer constant and hence [l] loses its validity. The inapplicability of [l] thus makes derivation of an effective pore radius, on the basis of [4] and Figure 4, dubious. 

High quality color reproduction is now obtainable by ink jet printing and will be illustrated. Once the printing parameters are selected, the quality achieved in the color reproduction depends strongly on the materials parameters of the system. Ink-paper interactions, ink formulation, and paper surface preparation all contribute to the quality of the resulting print. Archivality of the print is controlled by the lightfastness of the dye, the pH of the ink, and of the waterfastness achieved. 

Since ink jet technology has not yet been used for high quality color reproduction, the objectives of this process must be considered in terms of the materials limitations of ink jet printing. When a color reproduction is made by a mechanical process, much time is spent matching different dyes and papers with the desired effect wanted. After the materials decision is made,... 

This work will describe a series of magnetic colloidal systems that were specifically developed for an application in ink jet printing technology. This application imposes a certain set of requirements such as particle size 100 + 50A, magnetic moment of 25 emu/g or 35%w Fe O in colloidal dispersion, viscosity of 8-10 cps, non-toxic aqueous system, shelf life of a few years, freeze-thaw stability, fast drying (2 msec) and high optical density of magnetic ink on various papers. 

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