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We discussed some kinds of additives for inkjet ink to improve ozone fastness of a print image. Test patches were printed by an inkjet printer using water base ink containing the additive, water soluble dye, glycerol, and some penetrants which are inactive to ozone. The ozone concentration
of exposure test was 26ppm. We quantified hue change between initial print and the one exposed by ozone. First of all, some additives such as benzotriazole and amine, which are known to be effective on improving ozone fastness, and amino acid, which is known to improve dark stability of images,
are examined for Cu phthalocyanine dye. We found that amino acid type compounds were more effective on ozone fastness. Next, we examined carboxylate salts and a quaternary ammonium compound to understand the effect of carboxylic group and amino group on ozone fastness. After the examination
on many kinds of amine salts of carboxylic acid, the amine salt of low pKa carboxylic acid was found effective on ozone fastness. The mechanism of low pKa carboxylic acid was supposed that when the amine had a counter ion of low pKa acid, it could transfer the lone pair electron to ozone molecule
easily. We examined the same additives for azoic dye, and found that the amine salts of carboxylic acid were effective on ozone fastness.
Document Type: Research Article
Publication date: January 1, 2003
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For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.
Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.