Nowadays a great variety of caps has been developed and can help you to elaborate your pieces and artworks with spray paint. There are a number of different variations, from caps with a fine line of 1 cm or less, depending on your skill, to a clean line of 25 cm.
Each cap has its own function that adapts to a specific need. For that reason you will need to adapt the distance between the wall and your spray can. Usually is between 5cm and 20cm, depending on the speed of the movement.
Its mode of use is very simple since it is only put on top of the spray and can be removed with great ease. Caps are the device responsible for giving shape, strength and reach to the spray paint’s shot.
To get the most control, quickest fills and proper effects from your spray can, it helps to have a wide range of caps on you all the time, but I personally use the same one and changing it from one can to another.