In the course of slow evaporation of an azo-dye chrysophenine-saturated gelatin-water solution, dye crystals that developed two different interference colors were observed in the gelatin; the colors were yellow and blue. The crystals that produce a blue interference color undergo disintegration on exposure to non-polarized light from a mercury lamp.
© 2004 Optical Society of America
(160.0160) Materials : Materials
(160.1190) Materials : Anisotropic optical materials
(160.2900) Materials : Optical storage materials
(260.1180) Physical optics : Crystal optics
(260.5430) Physical optics : Polarization
Tariel D. Ebralidze and Nadia A. Ebralidze, "Hartley’s fractional crystallization and Weigert’s effect," Appl. Opt. 43, 1147-1148 (2004)