My mom used Spic and Span--remember in the 70s clearly it had two types of granules mixed---a green spray-dried granule (doubtless the surfactant/fragrance/color) and a needle-like crystal (pretty evidently the TSP). I think later on when they went to a non-phosphate formula the difference in the granule type was less clear.
I've mentioned before---my grandfather worked on early detergents in the '40s...P&G along with all the other "soapers" mixed and matched their chemicals and formulas to get the desired characteristics...whatever would let them get a slight advantage in the marketplace.
I've mentioned before---my grandfather worked on early detergents in the '40s...P&G along with all the other "soapers" mixed and matched their chemicals and formulas to get the desired characteristics...whatever would let them get a slight advantage in the marketplace.