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.


        日韩人妻精品一区二区三区视频| 97欧美精品一区二区三区| 四虎福利免费在线观看| 亚洲欧洲av无码专区| 亚洲天堂av免费在线| 亚洲精品一区二区蜜桃| 性色蜜臀av一区二区三区| 欧美日韩亚洲综合国产人| 九色视频在线观看91精品| 久久噜噜噜精品国产亚洲综合| 一区二区三区视频午夜在线| 超级碰碰视频一区二区| 久久一区二区精品毛片| 一区二区三区日本欧美| 久久综合久久爱香蕉网| 欧美日本一区二区三区精品免费| 成人欧美一区二区三区黑人免费| 麻豆久久亚洲av成人无码电影| 日本一区二区三区黄色| 七十二式性日韩视频| 国产乱老熟视频乱老熟女| 久久久国产精品久久久久| 国产日韩精品一区二区三区在线| 日韩一区二区三区三级| 日韩视频在线观看福利| 韩国午夜福利片在线观看| 久久精品午夜福利视频| 国产精品中文字幕在线播放| 蜜桃一区二区三区免费| 欧美性欧美巨大黑白大战| 日本特黄特色大片免费| 国产精品久久久久97| 久久久国产换脸三级| 国产免费午夜福利播放| 免费无码又爽又刺激高潮视频| 国产精品三级国产精品高| 午夜亚洲一区二区三区| 亚洲精品国偷自产在线| 国产乱码精品一区二区三区视| 熟睡中被义子侵犯在线播放| 欧美日韩亚洲高清专区|