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Female chemist holding litmus paper in hands. Analyzes ph test in a chemical laboratory. Chemistry industry education concept

Chemical indicator papers. Right paper shows weak acid, left paper shows weak alkali. Chart on booklet cotaining papers out of focus in background.

ph paper test

Abstract white background with colored ph paper

Hands holding litmus test paper for soil analysis. Litmus paper shows acidity, chemical analysis. Soil sampling for ph test. Strips and scraps filter paper tape. Accurate measurement results

Litmus paper test for pH level of gastric acid. Vintage etching circa mid 19th century.

Jeweler is using equipment to test scrap gold. Shot with Canon 5D Mark lV.

11 free litmus photos from Freerange

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