Re: bleach strength does vary

Hello all,
Different brands of household bleach do/can have different
strengths.  I compared the labels of a couple of nationally-known
brands with some generics and store brands; the nationally-known
were 5.25% while two of the store brands were 3.85%, i.e. the
weaker store brands were less than three-quarters the strength 
of the nationals.  Which is the 1:19 mix ratio based upon?

PJ (jellison at ceps_nasm.edu)
(whose sword plants are doing much better thanks to your collective