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Wet Scrub Resistance Tester

Wet Scrub Resistance Tester
Wet Scrub Resistance Tester
Product Code : Wet Scrub Tester
Brand Name : Erichsen
Product Description

ERICHSEN Washability and Scrubbing Resistance Tester  

Model 494 MC

 Operation via keyboard and display adjustable stroke rate and stroke path                                Parameter storage for 20 test cycles up to 3 tests simultaneously

Technical Description

For the assessment of the washing and scrubbing resistance as well as cleanability of dispersion paints


DIN 53 778-2                                                                                                                                    

ASTM D 2486

DIN EN ISO 11998


Purpose and Application

The ERICHSEN Washibility and Scrubbing Resistance Tester, Model 494 MC, is mainly

intended for the determination of the washing and scrubbing resistance as well as cleanability of

dispersion paints (specifically ”wall paints”). The wide range of its adjustable parameters allows also

some further tailored/customized testing matters (for example for testing cleaning agents/solutions,

etc.) as well.


Principle of Test

In the above standard applications a matt black PVC foil will be coated, and - if required - soiled in a

defined manner. After clamping into the device it will be exposed under the influence of a washing

liquid the stress of the moving scrub body:


a) Test in accordance with DIN 53 778- 2 *) The scrub body is a defined pig bristle brush, which

is charged with 250 g. The washing fluid iscontinuously fed by a micro dosing pump. Whether

the contamination has been removed or the coatingis scrubbed through to the substrate, will be

checked after an agreed number of scrubbing cycles. *) withdrawn, replaced by DIN EN ISO 11998


b) Test in accordance with ASTM D 2486 The scrub body is a defined nylon brush, which is

charged with 454 g. The washing liquid is applied manually during the test at regular intervals and in a

defined amount. For sharpening the wear effect of the scrubbing action, a narrow thin strip of metal

sheet will be placed centrally and transversely to the stroke direction unter the foil. The test result is

the number of double strokes up to scrubbed through to the substrate.


c) Test in accordance with DIN EN ISO 11 998 The scrubbing body is a defined type of abrasive

pad **) loaded with 135 g, which is moistened prior to the test only once with a defined quantity of the

washing fluid. After scrubbing strain (200 double strokes) the mass loss per unit area of the coating

and the average layer thickness loss will be determined. **) Abrasive pad "3M Scotch Brite, No. 7448" can be obtained from the local dealer.

 Design and Operation of Apparatus

The instrument (attached with leveling feet) has a top cover plate on which the steel trough for the

testing performance is placed. Further, it is equipped with two specimen clamping devices. A

high-precision step motor operated by a microcontroller allows a periodic linear movement of the

drive frame which holds/guides the abrasion bodies, with a high repeatability. The swivelmounted

frame for inserting the abrasion bodies is designed for holding/guiding up to three of them.

Due to this up to three parallel abrasion tests are possible. For tests according with DIN EN ISO

11998, the supplied ISO adapter has to be mounted.


No. Product-                 Description

0301.01.31        Washability and Scrubbing Resistance Tester,

Model 494 MC

The scope of supply includes:

Steel trough with outflow connection

Glass plate

Spirit level

ISO adapter

External wide-range power adapter

Operating instructions


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Contact Details
132, Room No.23, Princess Street, Govind Building, 2nd Floor, Kalbadevi Road,Mumbai - 400002, Maharashtra, India
Key Personnel
Mr. Praveen H. Bachhawat (Managing Director)