✦ LIBER ✦

Laser ablation of multilayers of ink from a paper substrate for tactile printing

✍ Scribed by R Stewart; L Li; D Thomas

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 236 KB
Volume: 32
Category: Article
ISSN: 0030-3992
DOI: 10.1016/s0030-3992(00)00067-0

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✦ Synopsis

This paper reports the e ects of laser ablation upon multiple-layered coloured inks which have been printed on an ordinary white paper. The aim of this work is to examine the feasibility of generating a fully tactile three-coloured image by selectively removing ink layers to reveal underlying layers of a di erent colour. In this paper laser ablation has been carried out upon four layered ink samples consisting of white=cyan=white=black layers. Ablation was carried out using a Q-switched Nd : YAG laser. The results show that it is possible to selectively remove the inks to expose both the top white and the cyan layers, although charring occurs with deeper ablation. An evaporation=decomposition mechanism is proposed to describe process of ink ablation.

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