Powder coating is an alternative to picture in which powdered , pigment particles are given an static bearing and sprayed over a grounded item using a special gun ; the powder is then heal using heat . The two main eccentric of pulverization used in powder covering arethermoplasticpowders and thermosetting pulverization . Thermoplastic powders can be melt when reheated , whereas thermosetting powders ca n’t be melt down again once they ’re cure . In traditional wet picture , the coating " cures " as the liquid part of the paint evaporates . Since there ’s no liquid involved in a gunpowder coating , it ’s considered dry paint . For these rationality , gunpowder program is also referred to as electrostatic powder painting and non - solvent picture .
The cure process for powder finish is unremarkably done in a special oven ; the program has to be scupper to a temperature range of 350 to 400 degrees Fahrenheit ( 160 to 210 degrees Celsius ) for 20 minutes . When melting the more coarse thermosetting gunpowder , it bonds chemically to form a heavy , lasting level of key . Thermoplastic powders harden , but if they are inflame again , they become malleable and only harden again when they chill .
To bring around powder coating , both the gunpowder and the substrate have to pass the desired temperature and remain there for the allotted time without any temperature fluctuation . For this understanding , the best path to cure powder coating is with a curing oven . However , a kitchen oven works just as well , as long as you do n’t plan to expend it for cooking food ever again . For belittled items , a wassailer oven is just as good . While some people may select to habituate a passion gun to evaporate the powder so that it stays in place while the item is transfer to an oven , a heat gas pedal ca n’t produce the necessary stable , all - encompassing temperature required to bring around powder coating .
