Testing TA How Red???

You add drops until the color starts changing, then continue adding drops as long as the color continues changing with each drop. When you add a drop and the color doesn't change you are done and you do not count the final drop (which didn't change the color).

The particular shade of red doesn't matter.
 
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.