<p>　　　答 某些还原染料分子上含有卤素（氯、溴）原子基团，在还原温度过高时，易导致脱卤，即卤原子从染料分子上脱落下来，而使色光发生变化，耐漂牢度下降。例如：还原青莲BB、青莲3B、绿2G和还原漂蓝BCS等。另外一些还原染料如还原橘黄RRT，在染色时其碱性隐色体受光照射也会造成脱卤素反应。</p><p style="font-size: medium; max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="font-size: medium; max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; font-size: 14px; overflow-wrap: break-word !important; outline: none 0px !important;">　　某些还原染料在还原温度过高或烧碱浓度过大时，染料分子与水分子发生化学反应，破坏了原来的染料隐色体，使染料减弱或失去对纤维的亲和力，不能染得理想的色泽，或染色</span></p><section class="_135editor" data-role="paragraph" id="autoparagraph" style="font-size: medium; max-inline-size: 100%; margin: 0px; padding: 0px; border: 0px none; z-index: 0; overflow-wrap: break-word !important; outline: none 0px !important;"><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; font-family: 微软雅黑, &quot;Microsoft YaHei&quot;, sans-serif; font-size: 17px; caret-color: rgb(255, 0, 0); overflow-wrap: break-word !important; outline: none 0px !important;"></p></section><p>　</p><p align="center"><img src="http://dayaotex-img.gz.bcebos.com/article/fffspic/yinranwenti4z50.jpg"></p>