To prevent to the utmost defective labels from being produced while producing the labels flexibly and adaptively in small quantities of many kinds, which production style is the main current of production systems for fiber products.

Substantially plain narrow-width texture 1 is laterally cut into label pieces, which are immediately folded at specified places. Immediately after folding or after a fixed number of obtained label pieces have been stored, characters, figures, etc., are printed in colored ink on individual label surfaces to form specified pattern layers. When the characters, figures, etc., are printed, the specified pattern layers may be formed on the individual label surfaces with colored ink containing fluorescent pigment.