Chinese Journal of Lasers, Volume. 9, Issue 12, 783(1982)
Study of a new reversible colour-change system by laser
A new reversible colour-change system composed of a chlorine-containing polymer and dimethyl yellow dye is reported and this colour-change mechanism is discussed. Upon exposure to UV radiation the polymer is decomposed and releases HC1 which reacts further with the dye to induce a colour-change from yellow to red. When irradiated with Ar+ laser, an inverse colour-change occurs presumably from the heating action of the laser.
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Zheng Guanglin, Shi Daojun. Study of a new reversible colour-change system by laser[J]. Chinese Journal of Lasers, 1982, 9(12): 783