Coating electronic assemblies with either a thin-film or thick-film lacquer is frequently referred to as conformal coating. The full area could be coated, or only a portion of it. The coating mainly serves to protect the assembly from environmental factors such as dust, contamination and humidity. In regards to protection from humidity, it is worth to note that the coatings protect only against a temporary exposure to humidity. For more permanent protection, other measures need to be taken.