直接測數法是憑借照布鏡(jing)或(huo)織(zhi)(zhi)物(wu)密度(du)分析鏡(jing)來完成。織(zhi)(zhi)物(wu)密度(du)分析鏡(jing)的刻度(du)尺長度(du)為(wei)5cm,在分析鏡(jing)頭下面,一(yi)(yi)(yi)塊長條形玻璃片上刻有(you)一(yi)(yi)(yi)條紅線, 主要區別(bie)在于織(zhi)(zhi)法不(bu)同,丹寧(ning)是斜紋(wen)(wen)的,一(yi)(yi)(yi)根緯紗(sha)(sha)穿過(guo)兩(liang)根或(huo)多根經紗(sha)(sha)。帆(fan)布是平紋(wen)(wen)的,緯紗(sha)(sha)和經紗(sha)(sha)一(yi)(yi)(yi)根一(yi)(yi)(yi)根縱(zong)橫交錯。斜紋(wen)(wen)織(zhi)(zhi)法的丹寧(ning)較光滑,手感柔軟,而平紋(wen)(wen)的帆(fan)布較粗糙(cao),不(bu)過(guo)...