The practice of natural colorants for polyester fabric dyeing has been rampantly rising in our consumer fashion. In this study, two separate natural colorants were extracted from watermelon (Citrullus lanatus) rind (WRS) and flesh (WFS) for polyester coloration. The optical and colorimetric properties of saps and dyed fabrics, dye fiber bonding phenomena, chromophores diffusion behaviors, color-fastness, ecological and economic aspects were examined through various analyses and the corresponding mechanisms were proposed. A wide range of chromophores diffusion was noticed for several parameter variations and the resulting diffusions were ranging from 42.67 to 83.13 %. Interestingly, WRS and WFS robust the UV shielding properties into the dyed fabric and the recorded UPF rating was found to be above 50. All color-fastness properties including sublimations were very good to excellent (4 to 4/5) except lightfastness. Finally, the ecological and economic aspects of WRS/WFS dyeing were also compared with commercial disperse dyes.

天然色料用于涤纶织物染色的做法在我们的消费时尚中迅速兴起。在这项研究中，从西瓜中提取了两种不同的天然色素（Citrullus lanatus）皮（WRS）和果肉（WFS）用于聚酯着色。通过各种分析，研究了色浆和染色织物的光学和比色特性，染料纤维的粘合现象，发色团的扩散行为，色牢度，生态和经济方面，并提出了相应的机理。注意到多种参数变化导致发色团扩散范围广，所得扩散范围为42.67％至83.13％。有趣的是，WRS和WFS增强了染色织物的UV屏蔽性能，记录的UPF等级超过50。所有的色牢度特性（包括升华度）都非常好（优异至4/5），除了耐光性。最后，还将WRS / WFS染色的生态和经济方面与商业分散染料进行了比较。