Oh And There's French On The Other Side
Fancy Henkel being bi-lingual back in those days.
Long story short have two pamphlets put out in French by Persil which gives directions for using this stuff.
Basically one was supposed to "soak, boil, rinse" instead of the usual scrubbing with a brush or washboard.
Two packets were slightly opened so after Hoovering the crates and each packetts (you don't know where they have been do you?), put about a teaspoon into a saucepan of cold water and allowed it to boil with a dish rag as a "test" wash.
First this vintage Persil is certainly soap,silicate, perborate and whatever else. The water mades a tell tale cloudly/milky appearance which indicates soap. After boiling the rag for ten minutes it was *clean* but aren't holding my breath as to how much power >50 year old perborate still has left.
Obviously this Persil wasn't meant for modern automatic washing machines, so it's a no go in the Miele. May experiment though with adding half detergent and a bit of the Persil along with STPP, you never know.. Have to find some use for the stuff or it will join the cases of Lux Flakes, P&G White Laundry Soap, Kirkman's Borax Soap, and Fels Naptha sat sitting stashed all over this household.