Recycled board manufacturing method and recycled board

A recycled board manufacturing method comprising:

• a fibrous material generation process of generating a fibrous material by grinding recovered goods containing fibers into a fiber form, wherein the fibrous material generated from the recovered goods includes first fibers colored a first color, second fibers of a different type from the first fibers and colored a second color different from the first color, and third fibers of the same type as the first fibers and colored a third color different from the first color;
• an adhesive application process of applying an adhesive having thermosetting properties to the fibrous material generated in the fibrous material generation process to generate a fibrous material mixture;
• a molding process of molding the fibrous material mixture into a board shape to produce a molded fibrous material mixture;
• and
• a pressing-heating process of pressing and heating the molded fibrous material mixture to produce the recycled board, wherein the first fibers, the second fibers, and the third fibers are exposed on a surface of the recycled board, without the surface being coated with a binder, so that a texture of the fibers is expressed on the surface of the recycled board.