| If the ink is placed too near the surface, it will prematurely fade or discolour. |
| Once activated, the nickel shield will quickly discolour from exposure to heat. |
| Once the fuzzy grey fungal growth appears on the foliage, causing it to discolour and rapidly deteriorate, the disease may then spread into the main body of the plant. |
| Aged vinegar acquires an increasingly brown colour as enzymes discolour compounds from the original fruit. |
| Using sealants which can discolour as a result of absorbing soil or dirt particles from atmospheric pollutants. |
| Avocados discolour very quickly, but a splash of acid rubbed or brushed on will slow that process. |
