How does a spray can work?

The basic principle of spraying: The liquid paint is pressurised in the can by the propellant gas (at approx. 4 bar). When you press down the sprayhead firmly, the propellant gas pushes the paint up the dip tube, through the nozzle and out of can. The paint and propellant form a mist spray when leaving the nozzle. The pressure of the propellant in the can varies depending on the temperature of the can and its contents – around 20-25°C is ideal. The correct distance between the sprayhead and the object to be painted is approx. 25-30 cm as this allows the propellant to evaporate from the spray jet before it hits the surface to be painted. This is essential if you want to achieve a smooth, flawless paint surface. As you can see, the principle of a spray paint can is fairly easy to understand. By simply observing a few basic rules when painting with a spray can, you should find it an absolute breeze!

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