| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for preparing a laminated sheet wherein even when the thickness of the sheet is thin, blackness and uniformity of color can be obtained. SOLUTION: The first coloring process wherein a thermosetting resin varnish is colored with a black coloring agent, the second coloring process wherein a glass base material is colored with the black coloring agent, an impregnating process wherein the glass base material obtained in the second coloring process is impregnated with the thermosetting resin varnish obtained in the first coloring process and then, dried to obtain a prepreg and a press process wherein the prepreg obtained in the impregnating process is pressed while it is heated are provided.
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