Chalking Rate Tester acc. to Kempf Model 241 DIN 53 159 Titangesellschaft mbH (Kronos Titan GmbH) testing equipment for quality management For quick determination of the chalking rate of coating materials

The first sign of a paint coating being affected by the weather is an initial disintegration of the surface film where some of the pigment becomes loose when originally firmly held in the paint by means of a bonding agent. This stage of deterioration can be shown by simply wiping the surface, loose pigment particles will be removed. This is called „chalking“. The sooner the paint commences to chalk, the sooner the decomposition of the film has begun; the life expectancy of the finish will therefore be accordingly shorter. Self-cleansing paints On the other hand, paints are being manufactured...

Test procedure The photographic paper is soaked in water at room temperature for four minutes. After removing any water adhering to the surface with filter paper, it is laid upon the paint to be tested, gelatine face down. Placing the rubber stamp on the reverse side of the paper, the Chalking Tester is pressed down as vertically as possible with the ball of the thumb - or with the lever when using the stand -with a pressure of 25 kg (55 lbs) until the ring mark 250 is reached After lifting the stamp the photographic paper is pulled off and dried. In special cases - to be agreed upon - a smaller...

Basically the instrument does not require any maintenance. Signs of wear on the rubber stamp and tensioning spring fatigue may occur after several years or after very frequent use. These parts are available as spares. The rubber stamp is removed by unscrewing the knurled supporting ring. Exchange of tensioning spring: The tensioning spring is replaced by unscrewing the domed cap on top of the loading device. Chalking Tester Dimensions: Special Stand approx. 450 mm approx. 150 mm approx. 250 mm Ordering Information Accessories / Spare Parts Chalking Scale in accordcance with the test devised by...