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Improvement of light fastness of water‐based printing inks with addition of glycerol derivative containing thiol groups
Author(s) -
IzdebskaPodsiadły Joanna,
ŻołekTryznowska Zuzanna,
Annusik Tatiana,
Tryznowski Mariusz
Publication year - 2018
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/cote.12315
Subject(s) - inkwell , optical density , fourier transform infrared spectroscopy , screen printing , densitometry , materials science , ageing , glycerol , chemical engineering , chemistry , composite material , optics , organic chemistry , physics , biology , genetics , engineering
The aim of this work was to study the influence of a glycerol derivative with thiol groups, 3,6‐dithia‐1,8‐octanediol ( DTO ), on light fastness of prints overprinted with water‐based flexographic printing inks. Laboratory printing was performed on various plastic films ( BOPP and PE ). The effect of a small amount of DTO on printing ink colour was examined by studying the optical density of a full tone area, relative printing contrast and the colour values ( CIELAB ), and the total colour difference, Δ E a b ∗ . Artificial ageing was applied in order to investigate DTO influence on colourfastness of CMY printing inks. Densitometry and spectrophotometric parameters were measured during artificial ageing by irradiation. Additionally, FTIR spectroscopy was used to observe the changes in ink film on printing bases before and after ageing. The print quality of investigated prints is widely discussed. In general, DTO addition influenced the printability of the plastic film and the optical density of a full tone area with an acceptable total colour difference Δ E a b ∗ . Furthermore, printing inks with added DTO exhibited higher optical density and smaller changes of Δ E a b ∗during artificial ageing. Moreover, the FTIR spectra of printing ink films with added DTO after ageing did not exhibit any perceptible changes in contrast with the original printing ink.