The gas waste contains volatile organic substances (VOC's), steams of acids and particles.

The installation of suitable ventilators, the creation of overpressure from nitrogen atmosphere, the use of a steam recovery system and storing it in a tank with floating roof are some of the practices that lead to the reduction of the volatile organic substances (VOC's) from tanks with constant roof. In addition, there can be installed airtight covers in the mixing tanks and floating lids in the solvents' storage tanks for the solvents. Moreover, recovery systems can be installed in the ventilation units in order to recovery the VOC's.

The storage vessels of solvents should be maintained sealed and, when it is possible, the solvents should be replaced by materials that do not contain volatile organic substances.

In order to minimise the steams of acids, it is useful to transfer the acids from the bottom of the tanks so that to avoid the diffusion of the steams in the atmosphere.

A method for reducing the production of particles is to wet the products with special oily substances during the stage of standardisation and to install bag filters for the recovery of the product that is lost during the production process (mainly during the milling). Another effective practice is to use raw material in the form of pastes.