| A little zinc in the mix will brighten the reds, and a little vanadium pentoxide is sometimes added to prevent discolouration. |
| When the job is finished, you should not place items such as mats on the floor for several weeks, as they will cause discolouration. |
| Tooth decay, fillings and tartar build-up can also all contribute to discolouration. |
| For instance, you may experience dryness or even mild discolouration in patches. |
| As a skin expert I also meet many pregnant women who develop chloasma, a patchy skin discolouration. |
| She warned that sunbeds cause premature ageing of the skin resulting in loss of elasticity, sagging, wrinkling, freckling, yellowish discolouration and brown patches. |
