"bouteille de gaz"

No Color Chart Necessary.

See Dramatic Color Changes

Pocket sized vials for pH testing.

Use this paper to cover both the A range (2-4-6-8-10) and the B range (1-3-5-7-9-11) of the pH scale.

The indicator on these strips won’t contaminate the solutions the strips are testing.

Ideal for classroom use, this general purpose pH paper provides a distinct color match for each pH unit from 1 to 14.

The Ultimate in Wide Range, General Purpose pH Papers.

Includes Color Comparison Chart.

Provides a simple, fast, economical method of pH measurement

Works Directly on a Soil Sample, Eliminating the Need for a Soil Extract