How do I tell if the test has gone from Blue to Pink to White?
The blue colour will vary depending on the liquid being sampled. In milk it may be hard to see the blue and it may be affected by sedimented samples – however, it will still work! The pink and whites will vary in depth and hue depending on the specific bacterial genera or strains that are present. No matter what the level of colour, they will still be blue versus pink versus white.