清纯美女爱爱高潮av,性都花花世界亚洲综合,国内揄拍国内精品久久,久久综合久久爱香蕉网,国产夜色撩人最新地址,成人在线精品国产亚洲,久久夜色精品国产一区,91深夜福利在线观看,亚洲成在人线免费观看,美女口爆吞精在线播放

        Online Sevice

        • Nantong YUEYE Textile Co., Ltd.
        • Tel:0086-513-85261533 
        • Fax:0086-513-85261511
        • ADD:No,1111 Taiping Road(N),Guanyin Shan Street,Nantong Jiangsu.China
        • E-mail:gjx@jsyyfz.com

        Method of identification of pure wool fabrics
        2015-01-13 00:00:00

        methods


        Sense of touch. Pure wool fabrics usually feel smooth, long wool fabrics along with the feel of smooth, reverse hair tingling. And blended or pure chemical fiber, some less soft, some too soft and loose, and sticky feeling.


        The colour and lustre. The color of pure wool fabric is soft and natural, bright and timeless. In contrast, blended or pure chemical fiber fabrics, or luster is darker, or have a sense of flash.


        The elastic. Hold the fabric tightly by hand, then release it immediately to see how elastic the fabric is. Pure wool fabric rebound rate is high, can quickly restore to its original state, and blend or chemical fiber products, wrinkle resistance is poor, most of the more obvious wrinkle marks, or slow recovery.


        Combustion identification. Take a bunch of yarn, use fire, pure wool fiber smell like burning hair, chemical fiber smell like burning plastic. The harder the particles are after combustion, the more chemical fiber components there are.


        Single root identification. Hair under a microscope to see all the animals have scales, if is long hair fabrics as long as take a hair like above laid a few times will move up or down (to master this skill can take a hair from the first experiment), if it is a normal fabric, extracting a root yarn, cut 2 cm of the two paragraphs into one fiber under the hand rub four or five, they would not move.


        深夜成人在线观看精品| 熟女av天堂免费高清| 中字综合一区二区三区| 伊人久久大线蕉av成人网| 黑人一区二区三区黑人| 日韩视频在线观看 一区二区| 亚洲一区二区婷婷香蕉丁香| 久久夜色精品国产亚洲| 亚洲免费一区二区三区四区五区| 91麻豆精品福利在线观看| 亚洲成人午夜av在线| 日本久久一二三区不卡| 国产裸体在线观看网站| 精品久久久无码人妻字幂| 狂野欧美激情性xxxx| av天堂成人在线观看| 国产盗摄老熟女视频一区二区三区| 亚洲AV无码精品自拍| 九色国产精品一区二区久久| 国产传媒污视频在线观看| 午夜福利午夜福利亚洲| 国产在线精品不卡一区| 精品午夜一区二区三区四区视频| 亚洲综合日韩熟妇av| 亚洲欧洲中文一级综合| 麻豆av性感人妻诱惑| 亚洲精品欧美综合二区| 国产精品久久久久无码av| 午夜精品亚洲一区二区三区| 国产精品一级久久黄色片| 国内精品乱码卡一卡2卡麻豆| 深夜福利在线观看日韩| 中文字幕久久熟女人妻av免费| 精品夜色福利在线一区| 亚三级熟人久久熟人妻| 免费看撕开奶罩揉吮奶头视频| 国产盗摄精品一区二区视频| 亚洲国产成人乱码av| 四虎永久精品免费在线| 亚洲欧美黑人深喉猛交群| 亚洲精品一区二区九九|