scope:

This objective method covers an instrumental comparison of a sample's colour against a reference by defining measurement conditions and measurement procedures for the measurement of colour of interior materials.

The aim is to instrumentally determine those colour differences between sample and reference, which are caused by colorants, different surface structures, or which arise after testing of, e.g. ageing.

The measurement results are similar to those of the visual perception, BUT visual assessment according to Ford method BI109-01 will always override numerical measurement data and is compulsory for any type of appearance approval.