"Repeating Decimal" <[Only registered users see links. ]> wrote in message
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There are tests that measure how much grime/grease the stuff can handle,
although these are more aimed at dishwashing liquids and similar.
The "strength" would be a combination of the amount of each surfactant
(easily quantifiable), how "strong" that surfactant is (a bit subjective,
although there is general agreement on which types of surfactants are the
strongest/harshest), and the pH (higher pH = better cleaning power).