If an ultraviolet curing resin is colored by contamination by another substance, there have been issues regarding increased cost and the environmental burden of treating the waste solution due to an inability to recycle the resin as it is. The ultraviolet curing resin that is in a colored, uncured state is decolored in the present invention by irradiation of light having a wavelength in the vicinity of the maximum absorption wavelength of the coloring material, and then recycled. As a result, it is possible to reduce costs and contribute to the protection of the environment.
如果紫外线固化
树脂因受到其他物质的污染而着色,则由于无法对
树脂进行原样循环利用,会增加处理废液的成本和环境负担。在本发明中,通过照射波长在着色材料最大吸收波长附近的光,对着色、未固化状态的紫外线固化
树脂进行脱色,然后进行回收。因此,有可能降低成本并为保护环境做出贡献。