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.


        性情中人中文网| av在线免费观看天堂| 国产日韩精品一区二区三区视频| 国产一区日韩一区二区| 亚洲最大成人午夜视频| 国产亚洲精品无码专区| 精品熟妇人妻一区二区三区| 日韩一区不卡在线观看| 亚洲中文字幕乱码精品| 91精品对白国产在线| 成人影院激情av在线| 国产av日韩av一区二区三区| 美女视频黄的日本的日进去了| 激情内射一区二区三区| 99精品国产一区二区三区不卡| 国产精品亚洲精品日韩己方| 最近中文字幕免费手机版| 日本免费小视频一区二区麻豆| 国产熟女碰碰人人a久久| 欧洲区亚洲区在线观看| 两女女百合互慰av赤裸无遮挡| 国产精品一区精品二区| 一区二区三区国产日本| 日韩人妻高清精品专区| 亚洲女同中文字幕一区二区| 中文无线乱码二三四区下载| 日本区一区二在线观看| 亚洲欧美国产精品久久久久久久| 九九久久只有精品视频| 男女无遮挡xx00动态图120秒| 激情综合网伊人久久| 精品四虎国产免费观看| 尤物视频资源在线观看| 蜜臀视频在线观看一区| 日韩欧美国产另类在线| 亚洲一区二区国产观看在线| 国产欧美日韩久久久久| 亚洲精品国产国语对白| 中文字幕有码高清日韩| 亚洲 国产 韩国 欧美 在线| 国产亚洲一区二区四区|