... 490D,560D,620D,720D,840D,1120D,1680D for diaper. Soft spandex RYT902C 120D,180D,260D,560D,720D,840D,etc. ... produce white and black spandex.Usage: Covering core, air interlacing yarn, circularly knitting, warp knitting, weft knitting, stockings, covering with ... very near its original length and shape, and Lightweight, soft, smooth, supple,greater evenness,stability and thermal resistance. Certificate ...