After testing, put the pH strips in order of increasing pH of the solution tested.
You can use the table in the Introduction as a guide.
The Variations section has some additional suggestions for independent confirmations of the pH readings.
Do you see a gradual change in color as the pH of the tested solutions varies? Can you match specific colors to certain pH levels? Over what range of pH does the color continue to change? How accurately do you think you can determine the pH of a solution with your test papers? Within 1, 2, or 3 pH units?