There are a few dozen alternative ways to use paint. all uniquely suited to a particular job. This offers several sorts of plant application methods and their strengths and weaknesses. Besides the “conventional” method of applying coatings, many choices exist for someone who is involved in painting or coating operations. The proper choice for you depends on your particular business operations—the sort of pieces you coat; the finished appearance requested by customers; money available for equipment, training, and maintenance costs; and even what proportion room you've got in your business.
Low-Volume High –Pressure (LVHP)
Low-volume high-pressure spray (LVHP) is taken into account the traditional method of applying coatings. It depends on air-atomizing the paint at pressures of 40–70 pounds per square inch (psi). Air is supplied from a compressor or turbine. While these spray systems create top quality finishes at high production rates, they do have several disadvantages, including extensive overspray, increased booth cleanup costs, and increased filter use and related costs. Additionally, if a better coating thickness is necessary, more operator passes could also be necessary to urge the specified mil thickness, and hence application time is increased.
High-Volume Low –Pressure (HVLP)
The principle of high-volume low-pressure (HVLP) has been applied to “conventional” spray guns to use paint with a high volume of dispersing air at low pressures. HVLP guns have nozzles with larger diameter openings for atomizing air, are often bleeder or non-bleeder types, and need air volumes of 10–30 cubic feet per minute. Air and fluid delivery to the applicator affect the efficiency, simple use, cost, and flexibility of HVLP sprayers.
Drying and Curing
Getting the paint or coating to your product’s surface is merely half the process—the spouse being how the coating is going to be transformed into the hard, protective, decorative finish that your clients will desire. Will your paint dry by evaporation? Will drying outside your booth be necessary thanks to your choice of coatings or to your production schedule?
If the resin or binder is claimed to be convertible, then it undergoes some sort of reaction to transform it into a solid film. If the resin is non-convertible, then it's only the evaporation of the solvents within the paint that causes drying and leads to the specified film. Some coatings are cured by a process which will be controlled, like baking, providing a chance for overspray
Several factors affect how good the paint coverage is on the piece, also because of the transfer efficiency of the appliance. Transfer efficiency is the relationship between the quantity of paint you apply and therefore the amount of paint actually adhering to the part being coated. the upper the transfer efficiency of your process, the more paint you've aged your part and therefore the less overspray you've got. Your equipment and booth setup, the sort of paint you’re applying, the particular product you’re coating, and your painting operators’ skill all factor into how efficiently you’re using your paint.