Introduction

Today, using polyester fiber, more and more new materials have been developed similar to natural fiber. Compared with natural fiber, treating synthetic fiber is easier due to its characteristics and fair fastness, therefore, the demand for it has increased. Commonly, the materials which mainly have been used for plain dyeing are also utilized for printing.
In today's printing processes, it is important to create a product with designs expressed accurately on cloth with aesthetic properties. If a printer cannot put out a fine design in multicolor with the direct printing method, resist printing or discharge printing is necessary in order to manufacture high quality products.
In the case of printing motifs that do not overlap on a white ground, the direct printing method will be appropriate. If a new motif is to be printed on a darker ground with the direct printing method, the outline of the overlapped colors will be fuzzy, therefore, the quality of the print will go down. In this case, resist printing should be carried out to produce clear outlines of the motifs. In the case of printing a motif on ground dyed cloth, discharge printing is appropriate. Even if the ground dye is light, in printing various check patterns (dyed yarn patterns), it is very difficult to put out sharp patterns, therefore, resist printing or discharge printing is recommended for dyed yarn fine patterns. If printers at factories do not only use the direct printing method but also establish discharge /resist printing techniques based on this method, it will be possible to produce high value goods which can satisfy our customers.