Laundress
Have not used the Persil or others you sent, have them on display! And did'nt want to open the old Lux as it was still sealed, and in pristine condition (ThankYou)
But did an autopsy on the P&G White *LOL*
" P&G White Naptha" prior WWII.
As with soaps of this age I found it interesting to see how much of the soap converted back to a simple compound of soda ash, and also wanted to investigate, and test for what would have been used during WWII as a replacement for the naptha ( P&G)
I Use a small keyhole saw to remove a section of the center of the soap, where I felt it would still likely be.. well... soap! Then proceeded to the center of that! My tests results pointed to a small % of mineral spirits for the P&G White.
I'm only guessing, but the naptha solvent ( little more volatile than mineral spirits) may have been a more valued commodity for the war effort? Hence the temporary switch ?
I'm going to dissolve the pieces that are left of that bar, in a solution to see if the fatty acids can be identified. Basically trying to find out, or guess what fats were used in the creation, and in what percents. Fun Fun *LOL*
What's left will get thrown into the Maytag E with some dirty clothes!
Waste not want not!