Stain removal is one of the most important performance tests for laundry detergents.
Common testing methods use an advanced stain set which covers the most relevant stain groups like bleachable, enzyme relevant and surfactant sensitive.
Test strategies cover either technical or natural stains. Natural stains are preferred in consumer relevant test designs and can be evaluated either by measurement or visual by panel (most compa-rable with customer experience).
Trend in consumer households can influence the selection of stains for testing to reflect customer habits. Examples can be the use of higher amounts of UV- filters in sunscreens or the growing usage of thickeners in convenience food and in cosmetic products.
A definitively missing stain is a consumer relevant body soil stain.
The presentation shows an overview about new developments and test designs with example on market available products.