UV rays are the most active part of the light spectrum. They are used for curing in P40 plastination technology. The UV rays are divided into three sub-spectra, which also affect the human body: UVA - pigment-forming or long-wave (400-320 nm); UVB - erythrogenic, vitamin D forming or medium (320-280 nm); UVC - bactericidal or shortwave (280-100 nm). The sources of UV rays are two types of luminescence: non-selective mercury-quartz lamp, emitting all the spectra of light but most of all UV rays; and selective - bactericidal lamps, emitting at a fixed frequency of about 254 nanometers.
An alternative source of UV radiation is a light-emitting diode (LED) lamp where the light source is a light-emitting diode, which emits at a wavelength of 365-395 nm. LED is a semiconductor crystal that emits energy in the form of visible, infrared and ultraviolet light, with little electrical power.
The advantages of this alternative source are low power, resistance to shocks and vibrations, and low level of exposure to the human body. The disadvantage of LED is the narrow field of irradiation (no more than 30 cm), which is not an obstacle, as it rarely exceeds it in the sheet plastination. With the future development of LED technologies, this alternative source of UV rays will be very relevant in the preparation of brain slices.
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