{"id":9162,"date":"2023-06-30T05:34:10","date_gmt":"2023-06-30T05:34:10","guid":{"rendered":"https:\/\/tank007.com?p=9162"},"modified":"2023-06-30T05:34:18","modified_gmt":"2023-06-30T05:34:18","slug":"which-is-the-best-uva-flashlight-wavelength-used-in-the-curing-field","status":"publish","type":"post","link":"https:\/\/www.tank007.com\/which-is-the-best-uva-flashlight-wavelength-used-in-the-curing-field\/","title":{"rendered":"Which is the best UVA flashlight wavelength used in the curing field?"},"content":{"rendered":"
UV (Ultraviolet) refers to ultraviolet rays. In the electromagnetic spectrum, the frequency is 30PHz-750THz, which corresponds to the general term for radiation with a wavelength of 40nm-400nm in vacuum. It cannot arouse people’s vision. It is invisible light with a higher frequency than blue-violet light.<\/p>
Ultraviolet light can be divided into vacuum ultraviolet, mid-ultraviolet, and near-ultraviolet, corresponding to wavelengths <200nm, 200nm~300nm, and 300nm~400nm. We generally have practical significance in photochemical research and photocuring applications. The mid-ultraviolet and near-ultraviolet regions Ultraviolet light is usually divided into three bands: UV A (315-400nm), UV B (280-315nm) and UV C (200-280nm). UV A and UV B are mostly used in general photocuring systems, and UV C segment or even shorter wavelength light is used in the photolithography technology of integrated circuit manufacturing.<\/p>
The photocuring process is through the chain polymerization reaction of the photoinitiator. The polymerization increases the molecular weight of the system and forms a cross-linked network, so that the liquid resin becomes a solid dry film. The photoinitiated polymerization reaction is divided into free radical polymerization and cationic polymerization. The next article will describe two different initiator systems in detail.<\/p>