Phosphate Content Of Vintage Detergents

[stan]

Yellowing

Laundress make a good point on the possible yellowing!

Often time's "detergents" can do the same thing. And require a second rinse and or sour added.

With light colors, you find out real quick that there is a residue when you put a iron to a white shirt. Ends up having to be run thru another cycle, hot /warm (no detergent/soap) with sour, to get it out.

 

[launderess]

Fels Instant Soap

At one time most certainly did contain phosphates. See: https://books.google.com/books?id=m...5xq3aBQ&ved=0CDoQ6AEwATgK#v=onepage&q&f=false

Am guessing at some point the formula was changed.

In fact many so called "soap powders" at one time were *built* with phosphates.