Smart textiles are promising for the future of the textile industry, providing natural fibers with attractive and interactive features. Within this context, it is possible to emphasize the chromic materials, as, for example, the hydrochromic, which alter their visual properties (color) through an external stimulus (water). The purpose of this work is to functionalize and characterize cotton knitted fabric with hydrochromic agent studying the reversibility and fastness properties of the print. It was observed that the particles are well dispersed and adhered to the natural fiber surface and did not display significant changes in the color after subsequent washing and rubbing fastness cycles. 摘要 智能纺织品为纺织工业的未来带来了希望，它提供了具有吸引力和互动功 能的天然纤维. 在这种情况下，可以强调铬材料，例如水变色材料，通过 外部刺激(水)改变其视觉特性(颜色). 本研究的目的是利用水致变色 剂对棉针织物进行功能化和表征，研究印花的可逆性和牢度性能. 经观 察，这些颗粒在天然纤维表面分散良好，粘附在纤维表面，在随后的洗涤 和摩擦牢度循环后，颜色没有明显变化.