PremiumColor - Brilliant colour and hard-wearing

Interior wall paints: Carbon fillers herald a new era


The increasing demand for strong shades often presents the painter with a range of problems that have to be solved. These include the opacity, luminosity and repair capability of tinted products and their resistance to wear. In particular, the so-called writing effect, also known as white break, is especially pronounced with dark shades of matt interior wall paints. Even coatings in the wet abrasion classes 1 and 2 soon reach their limits with this problem. Even slight mechanical stressing of the surface, e.g. scratching with the finger nail, produces a point of bright abrasion which appears shiny when illuminated from the side. This phenomenon causes an unwanted visual effect on the wall surface and it is not unusual to receive complaints from the customer.

The carbon-reinforced interior paint (left) prevents the writing effect, whereas it cannot be avoided on normal coatings (right).

 

Fillers based on carbon

 

The reason for the formation of stripes is as follows: as is well known, along with the pigments, each coat of paint also contains fillers. With coloured coatings they are superimposed by the pigments. With gloss paints the pigments are enveloped in the binder, whereas with matt paints they lie free on the surface. When a matt surface is touched or rubbed, the pigments are, as it were, pushed to the side and the bright fillers are exposed. This means that the location now appears brighter. At the same time, smooth surfaces are produced at the affected locations, causing the incident light to be reflected in the direction of the human eye. Till now the writing effect has only been able to be prevented through the use of gloss coatings containing generous amounts of binder (e.g. Latex Satin 20). A silk gloss surface is not however always desired by customers, architects and planners. Therefore, previously a compromise always had to be accepted.

Caparol has taken up this problem and after extensive work in research has produced a matt interior paint with the name PremiumColor. Even in the deepest shades the coating itself is largely resistant to the writing effect. This property, unique so far, is facilitated by the use of special binders and fillers based on carbon. The raw materials used enable a high resistance to wear while at the same time giving a wide variety of shades for the paint. The fillers containing carbon protect the pigments anchored in the binder from abrasion due to their extreme hardness and prevent the formation of stripes which are characteristic of the writing effect. In addition, due to their minimal natural coloration the fillers facilitate high colour intensity and brilliance in the individual shades.

 

High resistance to wearing

 

PremiumColor produces a coating in wet abrasion class 1 which can be used as a protective finish in the same desired shade on surfaces already coated with Indeko-plus. Through the use of PremiumColor the hard-wearing properties of an interior wall surface are increased and the surface is protected against the writing effect. The field of application for this paint is wide-ranging. It can be employed in busy stairways, waiting rooms, industrial and manufacturing premises and, due to its resistance to disinfectant, in clinics and hospitals. The product is emission-minimised and solvent-free. It can therefore be used without reservation in children's rooms and playschools.
PremiumColor is currently only available as a basic material and must be tinted in the desired shade by the ColorExpress system before it is applied.

 

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