Infrared dryers are used to quickly dry putty and painted surfaces.
For drying, short-wave (with a wavelength from 2 to 0.76 μm) infrared radiation is used. The advantage of short-wave radiation in comparison with medium- and long-wave radiation is that it penetrates through all layers of the paint and varnish material and, being reflected from the metal, also makes drying of this material from the inside.
In the process of exposure to infrared radiation, most materials not only dry out (the solvent evaporates), but also completely polymerize. Therefore, the coating can be polished or sanded immediately after drying.
A few minutes are enough for drying, which increases the throughput of the painting area. In addition, energy resources are significantly (by orders of magnitude) saved, since there is no need, like in drying chambers, to heat a huge mass of air, which is used as an intermediate medium that transfers heat.