been looking for the old litmus papers with no luck when I came across this:
https://chemistry.about.com/od/chemistryhowtoguide/ht/makephpaper.htm
making Ph paper from red cabbages!!
is it a joke-anyone tried it?
I haven't tried it myself, but it isn't anything new. I remember it from my high-school chemistry classes, and that was almost 50 years ago. It definitely isn't a joke.
