Transfer Efficiency and Spray Technique
Transfer efficiency is the measurement of the percentage of the paint material sprayed that provides coating on the parts versus the percentage that is lost in the spray process. The type of spray gun is very important, but it is only part of the picture. The extent of automation and electronic control equipment, the cleanliness and maintenance of the system, the skill and training of the operator, the coating material, the product being sprayed, the flow rates, and spray booth air velocities will affect the transfer efficiency of any spray equipment. Table 7.1 provides a comparison of different technologies in field and lab tests, and shows the relative transfer efficiencies of each.