Qingdao Topwell Chemical Materials Co., Ltd. established in 2014, is a professional supplier engaged in the research, sale and customized special pigment and dye which in relationship with kinds of light– UV light, near infrared light(IR), visible light.

Our main products include,

1. UV/IR fluorescent pigment and dye,
2. Near infrared absorbing dye
3. Photochromic dye and pigment,
4. Visible dye
5. Thermochromic pigment.