<section data-role="outer" label="Powered by 135editor.com"><section data-role="paragraph" class="_135editor"><p style="vertical-align:inherit;line-height: 2em;">　　棉纤维生长时，有天然杂质（果胶质、蜡状物质、含氮物质等）一起伴生。棉织物经退浆后，大部分浆料及部分天然杂质已被去除，但还有少量的浆料以及大部分天然杂质还残留在织物上。这些杂质的存在，使绵织布的布面较黄，渗透性差。同时，由于有棉籽壳的存在，大大影响了棉布的外观质量。故需要将织物在高温的浓碱液中进行较长时间的煮练，以去除残留杂质。</p><section class="_135editor" data-tools="135编辑器" data-id="109675"><section style="text-align: center;margin: 10px auto;"><section style="display: flex;justify-content: center;align-items: flex-end;"><section><section style="display: flex;align-items: center;"><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section></section><section style="display: flex;align-items: center;margin-top: 3px;"><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section></section><section style="display: flex;align-items: center;margin-top: 3px;"><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section><section class="assistant" style="width: 6px; height: 6px; background-color: rgb(255, 240, 158); border-radius: 50%; margin-left: 4px; overflow: hidden;"></section></section></section><section style="width: 50%; margin: 0px -50px 0px -60px;" data-width="50%"><section style="border: 1px solid rgb(140, 183, 246); border-radius: 50%; padding: 6px;"><section style="width: 100%;" data-width="100%"><img style="vertical-align: inherit; width: 100%; display: block; border-radius: 50%;" src="https://bcn.135editor.com/files/users/390/3900717/202202/29OaPQBh_ScFW.jpg" data-width="100%" data-ratio="0.6528599605522682" data-w="507"></section></section></section><section style="width: 25%;" data-width="25%"><section style="border-radius: 50%; padding: 2px;"><section style="width: 100%;" data-width="100%"><img style="vertical-align: inherit; width: 100%; display: block; border-radius: 50%;" src="https://bcn.135editor.com/files/users/390/3900717/202202/zEw2MdGK_sAD7.jpg" hm_fix="334:403" data-width="100%" data-ratio="0.678" data-w="500"></section></section></section></section></section></section><p style="vertical-align:inherit;text-align: center" align="center"><br></p><p style="vertical-align:inherit;text-align: center;" align="center"><br></p><p style="vertical-align:inherit;line-height: 2em;">　　煮练是利用烧碱和其他煮练助剂与果胶质、蜡状物质、含氮物质、棉籽壳发生化学降解反应或乳化作用、膨化作用等，经水洗后使杂质从织物上退除。</p><p style="vertical-align:inherit;"><br></p></section><section class="_135editor" data-role="paragraph"><p style="vertical-align:inherit;"><br></p></section></section>