Quote:
Originally Posted by condo_pygmy  childofthetao U may be getting the STB tek mixed up with the Mars tek, in Mars tek all U really need to do is add enough lye till the solution turns all BLACK like used motor oil. as for the STB tek it doesn't use any vinegar or acid of any type. |
Interesting, it was always a very dark, almost black colour even before adding the lye, unless I'm remembering wrong :/