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.


        久久这黄色精品免费久| 日韩高清精品一区二区三区| 成人午夜福利精品视频| 久久久久亚洲av成人无码电影| 色欲狠狠躁天天躁无码中文字幕| 午夜亚洲国产精品中字| 肉丝少妇一区二区三区| 久久亚洲av无码精品色午夜麻豆| 永久免费看黄在线观看| 日本一区二区三区最新不卡视频| 日韩精品一区二区三区四区| 亚洲一区二区韩国精品| 日韩精品久久一区二区三| 国内少妇自拍视频一区| 日本一区二区免费在线观看| 无码人妻精品一二三区免费| 精品久久久久久一区二区三区| 国产精品亚洲欧美大片在线观看| 成人永久免费在线视频| 亚洲视频中文字幕第一页| 日本特黄特黄刺激大片| 一区一区三区产品乱码| 日韩女优av一区二区三区| 精品国产av一区二区三区ake| 亚洲精品午夜国产va久久成人| 日本一区两区三区不卡视频| 久久国产超碰女女av| 91精品国产日韩欧美综合| 大地资源免费视频观看| 亚洲视频中文字幕国产精品| 一区二区中文字幕av| 日韩精品极品视频在线观看免费| 波多结野中字在线播放| 国产亚洲精品久久麻豆| 国产白丝在线免费观看| 久久精品色妇熟妇人妻| 自拍内地三级在线观看| 综合色天天鬼久久鬼色| 蜜桃视频午夜在线观看| 性感熟妇被我玩弄到高潮| 韩国美女免费观看av|