In any assessment of surtace active agents and formulations prepared fromThem, a knowledge oftheir foaming power can be an important factor; frequently, a particular level of foam formation shouldbe demanded, whilst in other cases foam formation should be required to be minimal.The special advantage of this beating method of foam determination is to yield comparable, parallelvalues for up to six solutions of surface active agents. InThe same mannerThe stabilitylfoamdecomposition of this wet-foam, or its behaviour under stress, can be observed (water hardness,defoamer, fats etc). Serial trials can economically be carried out.Usually, diluted solutions of 0,01%(m/m) to 0,2%(m/m) of the product under test are used, but lowfoaming agents can require contents of up to 1%(m/m).The interpretation and assessment of the foam chasometimes use of other methods.Therefore, other ifoam, dish washing liquids, shampoos etc., which areof foam producing.use requires experience andexample for fire extinguishingspecifically adapted toThe mechanical conditions
EN 12728:1999 history
1999EN 12728:1999 Surface active agents - Determination of foaming power - Perforated disc beating method