Coating comprises resin/polymer/binder, pigment/filler, solvents/thinners and additives as main ingredients. All these ingredients are characterised for their own typical characteristics. Solvent gets evaporate out from the coating during drying process and hence never be an integrated part of dried coating. Selection of correct ingredients in correct proportion for formulating the coating is always a challenging job for the coating formulator. Formulator has to consider all the factors like application of coating, availability of raw material, curing mechanism, financial aspects of coating etc. Requirements of coating differ as per the end application therefore selection of coating ingredients also differs accordingly. Resins are polymeric materials and responsible for almost all functional properties of the coating like adhesion, gloss, film formation, hardness, flexibility, chemical resistances etc. Pigments are used to give colour and hiding to the coating materials. Some of the pigments also impart functional properties to the coating. Functional properties imparted by the pigments include heat resistance, light fastness, corrosion resistance etc. Solvent in coating formulation is used as thinner to facilitate the ease of applicability. Once the coating is applied, solvents evaporate from the film and dried film is obtained on the surface. Additives are used as a performance accelerator for the coating. Addition of small quantities of the additives will have dramatic change in the performance of the coating.