Colour coated steels are used in all sectors of industry. In building and construction, profiles are used for wall cladding and roofing, and also for applications such as suspended ceilings, lighting etc. Organic coated steel is economic, ecologic, and has a consistent quality. Paint film thickness, colour matching and surface aspect are reproducible within narrow tolerances from batch to batch. The flexibility of the coil coating process allows us to produce a range of different surface finishes such as smooth, orange peel, grained, textured or embossed, which can be obtained in a wide choice of colours (solid, metallic, pearlescent etc) and the required degree of gloss: anything from matt to high gloss.
Definition www.qdznsteel.com Colour coated steel is generally composed of a steel substrate (cold rolled or with a zinc-based metallic coating) with a surface treatment layer, a paint primer coating and a topcoat. For certain applications, a colaminated polymer film may be added, and a temporary protective film, if required. In building and construction, the substrate is usually galvanised steel: Galfan® or Aluzinc®. The choice of the paint system depends on the environmental conditions to which the product will be exposed. The role of the primer is mainly to enhance the adherence of the topcoat and improve flexibility and corrosion resistance. The topcoat, and the colaminated film if used, provide the required surface characteristics, such as the final appearance (colour, texture, gloss, appearance etc), hardness and resistance to abrasion and ultraviolet radiation. Depending on the required performance, a single (primer) or double (primer + topcoat) paint layer can be applied on one or both sides of the sheet.