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Soil redeposition kits

New in 2009:

Soil donor "Graying Swatch" for soil redeposition tests.

Background

"Soil makes a difference!" What is true for stain removal testing is even more true for assessing soil redeposition performance. Existing ballast soil systems for single wash tests are often used for such testing, but appear to be of limited suitability in some cases. An ideal redeposition test system replicates 'real' graying levels with less wash cycles: "Accellerate - don't exaggerate!"

Products

wfk GRAYING SWATCH

• 100 % cotton terry cloth swatch.

Soil consisting of fats, pigments, starch, proteine.
Application (full scale tests in washing machines):
- Use clean ballast loads.
- Use 1 wfk GRAYING SWATCH as soil donor per 3,5 kg ballast load.
- Use white test specimen (adjacent fabrics) as soil acceptors.
- Run 5 replicates, without exchanging the load and test specimen but replacing the wfk GRAYING SWATCH with a new one for each replicate.
- Evaluate the redeposition on the white test specimen e.g. by reflectance measurement.

The result is a fully realistic level of redeposition, achieved with a limited number of test runs.