If a substrate or object is coated, depending on the method of application used, part of the coating material employed is lost - a material loss.
This loss may be caused by overspray in the spraying process, for example. With regard to the economy of the coating process, the aim is to minimise material loss whilst at the same time achieving a high level of coating quality. This is expressed in the level of material effectiveness. This can be calculated after coating using a simple formula.
Material effectiveness of different applications:
|Dip coating (conventional)||ca. 90 - 95%|
|Coil-Coating||ca. 90 - 95 %|
|KTL||> 90 %|
|Pneumatic spray gun||ca. 40 %*|
|Airless gun||40 - 70 %*|
*The degree of material effectiveness is particularly dependent on the geometry of the work piece, the configuration of the work piece mount, the relative movement of the spraying tool to the work piece and the parameters of the spraying unit (including rotational speed, high voltage, spray current, coating throughput, distance between spraying tool and work piece, airflow in the unit, guidance air in the case of high rotation bells)