DYEING OR PRINTING OF HYDROPHOBIC FIBER MATERIAL

摘要

PURPOSE: To provide a dyeing or printing method giving a red-colored dyed product of a hydrophobic fiber material having dense and clear hue. CONSTITUTION: A hydrophobic fiber material is dyed or printed with a crystal modification of 3-phenyl-7-[4- -(tetrahydrofurfuryloxy)phenyl]-1,5-dioxa-s-indacene-2,6-dione having a crystal structure exhibiting strongest peak at the diffraction angle 2θ=4.7 deg. among peaks of 2θ>=3 deg. measured by X-ray diffraction with Cu-Kαline.