Quote Originally Posted by famousdavis View Post
So here's the question: When I add the reagent drops to the K-2006 that change the water color from pink to colorless, is the objective to really get it to be 100% colorless, or just mostly colorless with perhaps a slight tinge of pink still remaining? How colorless do you strive to make the water during this test?

There are no gradations of 'colorless'. It's an absolute. Colorless = absence of color = clear. A slight tinge of pink means there's still color and you're not done with the titration. Keep adding and counting drops until it is colorless.