Translations:Het detecteren bij podiumkunstenorganisaties van films en bijhorende magneetbanden die zijn aangetast door het azijnsyndroom/20/en
Significance of the value measured:
| Acidity level | Odour | Level of deterioration | Condition |
| pH 6 | no odour | level 0 | fresh film |
| pH 5,5 | no odour | level 1.a | deterioration begins |
| pH 5,0 | no odour | level 1.a | deterioration begins |
| pH 4,8 | slight odour | level 1.a | deterioration accelerates |
| pH 4,6 | slight odour | level 2 | autocatalytic point, to monitor |
| pH 4,4 | stronger odour | level 3 | recommended to make a copy |
| pH 4,2 | strong odour | level 3 | copy must be made urgently |