It's made of composite materials. These materials absorb staining foods and other substances over time and resist whitening. Put simply, composite veneers are more susceptible to staining.
Can composite veneers be whitened?
If you're wondering how to whiten your composite veneers, you may be tempted to try an at-home whitening treatment. Unfortunately, composite resin doesn't respond well to whitening.
How long do composite veneers stay white?
Composite is more versatile than porcelain, lasts 5-7 years and is much less expensive at £275-£475/tooth compared with £650-950/tooth for porcelain or what you might traditionally think of as a full smile design procedure.