MDF interior door skin
Materials of interior doors construction : MDF Interior Door Skin
Quote from Article entitled Materials of interior doors construction:
Interior doors made from high quality plastic more and more gain popularity in the market of constructional materials from year to year. Interior plastic doors are the most popular because of their durability, ease of upkeep (such doors are resistant to household chemicals, easy to clean), the affordable price and beautiful appearance.
The full version of the article can be found here.