I'm having some trouble figuring out how many drops to use to get an accurate reading on my TA test. The sample first turns and stays red at 7 drops but one additional drop makes it a more definite red. Additional drops beyond 8 don't make any noticeable difference. Should I read the TA as 70 or 80?
Also, on the CH test the sample changes from very pale pinkish red to pale purplish blue at 30 drops with no additional color change at 31 drops. Is this as blue as it should get?
Thanks again for the help, TFP is the best!