Teeth whitening strips are flexible, gel-based strips that are easy to use and effective in whitening teeth quickly. With the development of technology, teeth whitening strips have wet and dry options. Now let’s get a comprehensive understanding of the two options. - From the structure The teeth whitening wet strip consists of 3 basic elements: a plastic film layer(PE Film), an elastic gel layer, and a peel-off backing layer(PET Film). The PE film is a relatively comprehensive packaging film. It is characterized by good transparency and gloss, good air tightness and fragrance retention, medium moisture resistance, etc. And is used to protect goods from pollution, corrosion, and scratches during production, transportation, storage, and use. Here it acts as a barrier to saliva to protect the elastic gel layer. The elastic gel layer contains peroxide as a tooth whitening agent, a vegetable whitening factor, and a highly viscous hydrophilic elastomeric gel with an elastic film-like c