Standard test dust
In the description of the test procedure for motor vehicle headlamps emitting an asymmetrical passing-beam or a driving-beam the test dirt is specified which simulates the real dirt.
The test dirt is used for headlamps with an outer lens made of glass.
The composition of the test dirt is as follows:
9 parts quartz sand according to the specification in section 2.1.3
1 part beech coal
0.2 parts carboxymethylcellulose
Transport and Storage
Partial segregation may occur during transport and storage. It is therefore recommended to homogenize the DMT Test Dirt ECE R123 126.96.36.199.1 before use, which can be achieved by mixing with a laboratory tumbler mixer. Please store in a dry and airtight original container.
In order to achieve reproducible quality, the raw materials and production are strictly controlled. The following quality controls are carried out:
Monitoring the particle size distribution of raw materials
Monitoring the particle size distribution of the end product
|Name :||DMT Test Dirt ECE R123 188.8.131.52.1|
|Standard:||ECE R 123|
|Title of Standard:||Uniform provisions concerning the approval of adaptive front-lighting systems (AFS) for motor vehicles|
|largest particle size (µm) :||100|
|Bulk density (g/cm³):||0,90|
|Substance density (g/cm³) :||2,65|