METHOD OF DETERMINING MANUFACTURING CONDITION OF EYEGLASS LENS AND METHOD OF MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To provide means for obtaining a polythiourethane eyeglass lens which can avoid change into red-like color and maintain high quality for a long time.

SOLUTION: The present invention relates to a method of determining a manufacturing condition of a polythiourethane eyeglass lens obtained via a process of obtaining polythiourethane by polymerization reaction of an iso(thio)cyanate compound and a thiol compound, comprising: determining a candidate composition for a starting material mixture and a candidate polymerization reaction condition employed in the polymerization reaction in actual manufacture; polymerizing the starting material mixture of the candidate composition that has been determined under the candidate polymerization reaction condition to obtain a test sample; testing the obtained test sample by irradiation with a xenon lamp to determine whether or not change into red-like color is present following irradiation with the xenon lamp; and determining a starting material mixture composition and a polymerization reaction condition to be employed in the polymerization reaction in actual manufacture with a result of the determination used as an indicator.

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