The differing colour and fastness properties of dyes and pigments has predisposed the two classes of colorant towards different applications. This paper describes some work directed towards improving the fastness of azo dyes, whilst maintaining their superior colour properties in the yellow and magenta shade areas. The control of hydrogen-bonding offers a means for influencing fastness. Promotion of hydrogen-bonding interactions results in improved lightfastness, whereas the deliberate blocking of such bonding reduces fastness.
Clive Foster, Sidonie Leather, "New Colorants for Ink Jet Printing of Digital Images" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP21), 2005, pp 303 - 305, https://doi.org/10.2352/ISSN.2169-4451.2005.21.1.art00084_1