Periodic Yarn Variations that Create Design Effects on Fabric-Development of Related Software Programs Available to Purchase

Different periodic faults in yarns create different designs on fabric depending on the wavelength. In this paper, attempts have been made to develop a software program in Microsoft Visual Basic (version 6) to obtain some special effects or designs on fabrics by varying the wavelength of periodic faults. Definite periodic faults are not possible right at this moment, so the faults have been imitated with color effects. Diamond, twill, striped, three dimensional effect, etc. designs can be produced by using this program. Some mathematical functions have been obtained from the software program to create diamond or striped effects on fabrics. Diamond like shapes obtained from the software program have been practically verified on single jersey plain weft-knitted cotton fabrics on a flat-bed machine and found true to a certain extent. Distortions are observed in the design at higher fabric widths due to the uneven tie-dyeing of the fabric by the capillary action of the dye solution used. An attempt has also been made to develop another software program to specify the necessary sequence of colors for a specific length along the continuous weft yarn in a repeat for producing particular design effects or figures on fabrics.