• Quick visual indication of alkalinity
• Rough estimate of acid pH levels
• Red Litmus

Litmus is a water-soluble mixture of different dyes extracted from lichen. Dyeing filter paper either red or blue with this ink creates one of the oldest forms of testing alkalinity and acidity. Red litmus paper turns blue under alkaline conditions. Packaged in boxes of 100 strips of paper.

Sold in a pack of 12 boxes of litmus paper.