   thumb|three different brands of kalsomine; the directions for use are visible when viewing image at full size whitewash, or calcimine, kalsomine, calsomine, or lime paint is a low-cost type of paint made from slaked lime (calcium hydroxide) and chalk (whiting). various other additives are also used. ==whitewash== thumb|left|whitewashers, photographed by , 1928 whitewash cures through a reaction with carbon dioxide in the atmosphere to form calcium carbonate in the form of calcite, a reaction known as carbonation. when the paint initially dries it is uncured and has almost no strength. it takes up to a few days, depending on climate, to harden. it is usually applied to exteriors; however, it is traditionally used internally in food preparation areas, particularly rural dairies, for its mildly antibacterial properties. occasionally it is coloured and used on structures such as the hallways of apartment buildings, but it is not popular for this as it can rub off onto clothing to a small degree. in britain and ireland, whitewash was used historically, both externally and internally, in workers' cottages, and still retains something of this association with rural poverty. in the united states, a similar attitude is expressed in the old saying: "too proud to whitewash and too poor to paint", with the connotation that whitewash is a cheap imitation of "real" paint. whitewash is especially effective on adobe-like materials because it is absorbed easily and the resultant chemical reaction hardens the medium. also, whitewash and adobe are both very low cost building materials. === farming applications ===  thumbnail|a whitewashed 'langhuis' (long cottage) in rural verloren vlei, western cape region of south africa. whitewash is applied to trees, especially fruit trees, to prevent sun scald. most often only the lower trunk is painted. in poland painting the whole trunk is also said to help keep the body of the tree cool in late winter/ early spring months and hence help prevent fruit trees from blooming too soon i.e. when warm sunny days could promote rapid tree warming, rising sap and bloom and intermittent fros
Coatings Painting_materials