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Litmus paper test

Litmus paper test

A500/0262

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Credit

ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY

Caption

Litmus paper test. Litmus paper changes colour in acidic or alkaline conditions. It is a mixture of lichen pigments. It turns red in acids (left) and blue in alkalis (right). Distilled water (H2O, centre) is neutral and does not cause a colour change.

Release details

Model release not required. Property release not required.

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