PURPOSE: To obtain the subject fiber, rich in feeling of ultrahigh class and useful as cloths, etc., for interiors by subjecting either of warp and weft yarns of silk to degumming and bleaching treatment while keeping the other in an undegummed state, dyeing the yarns with a reactive dye, weaving a cloth from both the yarns, scouring the cloth and then carrying out bleaching treatment with an oxidation bleaching agent.

CONSTITUTION: Either of warp and weft yarns composed of silk is used in intact undegummed raw silk yarn and the other in the form of yarn is subjected to normal degumming and bleaching treatments, etc. The aforementioned yarns are dyed with a dischargeable reactive dye into a desired pattern to provide dyed yarns. Both the yarns are used to weave a cloth, which is then subjected to scouring treatment using a scouring liquid, prepared by dissolving a soap and an alkaline agent in water and containing an anionic surfactant or a nonionic surfactant, a white area staining inhibitor (a nonionic surfactant) a sequestering agent, etc., as additives. After completing the scouring treatment, bleaching treatment is performed with an oxidation bleaching agent to afford the objective cloth.