ISO 6330 Suds Levels

14 September 2012

Below, our Technical Manager Peter Goodwin provides some useful guidance on the suds levels required according to ISO 6330, and how to measure them on the Wascator FOM71 CLS.

Wascator FOM71 CLS

Checking the Suds Level According to ISO 6330

Requirements in Editions 1, 2 and 3

ISO 6330:1984

Add sufficient detergent … (1 to 3 g/l) to provide a good running suds having a height of not more than 3 cm at the end of the sudsing cycle.

ISO 6330:2000 and ISO 6330:2000+A1:2008

Add sufficient detergent … to provide a good running suds having a height of not more than

(3 ± 0.5) cm at the end of the washing cycle.

ISO 6330:2012

In Reference washing machines Type A, add (20 ± 1) g of the reference detergent 2, 3 or 6 directly into the dispenser.

Marking Suds Level Indicators on the Door Glass

Using the Level Check Programme, fill the empty machine to 130mm.

When the water is correct, mark the outside of the door glass with durable ink or adhesive tape.

Repeat this for the 160mm water level.

For washing programmes which have a wash liquor level of 10cm, the suds should reach the 13cm marker on the door glass.

For washing programmes which have a wash liquor level of 13cm, the suds should reach the 16cm marker on the door glass.

Other factors such as the variable composition of the load, final composition of the detergent (additions such as perborate/TAED), water quality (hardness) and washing temperature will influence the suds height achieved with a given quantity of detergent.

Questions/comments? Please comment below, contact us, or, if you haven't already, join our LinkedIn Textile Testing Group.

The group is made up of nearly 1000 members and is a forum for sharing knowledge, insights, expertise and experience with fellow professionals across the world.

Tags: Standards