pH

by Tim
(Australia)

I am intrigued by the science behind some of the carpet stain solutions (Stain Remover Characteristics) on your great site.

For tea, coffee,urine etc it is suggested to use an acid based solution.
On the other hand for acidic based stains you suggest an alkaline based solution.

Are not tea, coffee,urine not acidic by nature?

Is there a correlation between the pH of the stain and the pH of the solution to remove the stain and therefore,perhaps you "break-up" a stain with something opposite on the pH scale?
Or perhaps not!

Really appreciate your help.