Spraying is the most widely used method of application in leather finishing. Rotating spray guns inside spray machines apply the low-viscosity finish liquor to the horizontal leather. Even soft leathers can be processed by this technique. Modern spray units are equipped with computer controlled spray guns which recognize the outlines of the leather and so minimize overspray. They further operate under high volume, low pressure conditions to reduce spray drift.

For spraying earlier hand machines were used by which the whole leather was to be sprayed and now there are various automatic machines available in the market which help make the work fast and easy. It is prepared as per the demand of the consumer and marketer.

These machines can not only give a smooth finish to the leather but also give different colours. This is how a piece of leather gets different colours and shades.