Litmus Paper Litmus Neutral Book 1 set (20 sheets x 10 books) JT0210 1 set (20 sheets x 10 books)

This is a test paper for determining acidity and alkalinity, which is especially popular in schools and educational materials, but does not calculate pH values. Therefore, there is no need to compare/check with a color scale (color change chart). It is a book type in a plastic case (10mm wide x 60mm long, 20 sheets per book x 10 books). Color change: The purple test paper changes to red when it comes into contact with an acidic solution, and to blue when it comes into contact with an alkaline solution. Size: 10mm wide x 60mm long Quantity: 20 sheets/book x 10 books (book type)