The glass fiber may be randomly arranged, flattened into a sheet (called a chopped strand mat), or woven into a fabric. The plastic matrix may be a thermosetting plastic â most often epoxy, polyester resin â or vinylester, or a thermoplastic.he glass fiber may be randomly arranged, flattened into a sheet (called a chopped strand mat), or woven into a fabric. The plastic matrix may be a thermosetting plastic â most often epoxy, polyester resin â or vinylester, or a thermoplastic.
Signs and symptoms of black hairy tongue include: Black discoloration of the tongue, although the color may be brown, tan, green, yellow or white. A hairy or furry appearance of the tongue. Altered taste or metallic taste in your mouth. Bad breath (halitosis)
Usually these papillae are approximately 1 millimeter in length. Hairy tongue occurs due to lack of stimulation / abrasion to the top of the tongue. The result is a buildup of a protein known as keratin (the same protein that makes up the hair on your head). In severe cases, the length of these papillae can become quite long, giving a hair-like appearance to the top of the tongue (see Below and Right).