直接測數法是憑(ping)借照(zhao)布鏡(jing)(jing)或(huo)(huo)織物(wu)密度(du)分析鏡(jing)(jing)來完(wan)成。織物(wu)密度(du)分析鏡(jing)(jing)的刻度(du)尺長(chang)度(du)為5cm,在(zai)(zai)分析鏡(jing)(jing)頭下(xia)面,一(yi)(yi)塊長(chang)條(tiao)形玻璃片上刻有一(yi)(yi)條(tiao)紅(hong)線, 主要區(qu)別(bie)在(zai)(zai)于(yu)織法不(bu)同(tong),丹(dan)(dan)寧(ning)是斜紋(wen)的,一(yi)(yi)根(gen)(gen)緯紗(sha)穿過兩根(gen)(gen)或(huo)(huo)多根(gen)(gen)經(jing)紗(sha)。帆布是平紋(wen)的,緯紗(sha)和經(jing)紗(sha)一(yi)(yi)根(gen)(gen)一(yi)(yi)根(gen)(gen)縱橫交錯。斜紋(wen)織法的丹(dan)(dan)寧(ning)較(jiao)光滑(hua),手感柔軟,而平紋(wen)的帆布較(jiao)粗糙,不(bu)過...