In this work, different microfluidic colour-changing devices are implemented by using dry film photoresist-based moulds instead of standard photolithography moulds. EtertecHT-115T negative dry film photoresist is employed to realise the rapid fabrication of the moulds for colour-changing layers. The major factors that may affect the fidelity of the dry film moulds during fabrication are summarised and analysed, including the optimum exposure times and the appropriate developing times. Especially, the impacts of different concentrations of sodium carbonate (Na₂CO₃) solution on developing rate are investigated for 1–5 layers (50–250 μm thick) of EtertecHT-115T dry film photoresists by experiments. The created dry film moulds show the advantages of low cost, high manufacturing efficiency and requiring no professional training. Each application of the microfluidic colour-changing devices presents high transparency and good colour-changing effect. The microfluidic colour-changing layers based on dry film moulds can be used in different wearable devices of human, and also can be applied for realising surface camouflage and display functions of soft machines/robotics.

在这项工作中，通过使用基于干膜光刻胶的模具代替标准的光刻模具，可以实现不同的微流体变色装置。采用EtertecHT-115T负性干膜光致抗蚀剂可快速制造用于变色层的模具。总结和分析了在制造过程中可能影响干膜模具保真度的主要因素，包括最佳曝光时间和适当的显影时间。特别是不同浓度碳酸钠（Na ₂ CO ₃通过实验研究了1-5层（50-250μm厚）EtertecHT-115T干膜光致抗蚀剂对显影速率的影响。创建的干膜模具具有成本低，制造效率高且不需要专业培训的优点。微流体变色装置的每次应用都表现出高透明度和良好的变色效果。基于干膜模具的微流体变色层可用于人体的不同可穿戴设备，也可用于实现表面伪装和软机/机器人的显示功能。