Black fiberglass tissue is not recommended for bedding or curtains due to its composition and properties. Fiberglass is a type of glass wool that can be irritating to the skin and respiratory system. It is typically used for insulation and not for direct contact with the skin or as a decorative material. For bedding and curtains, it's better to use materials that are soft, breathable, and safe for human contact, such as cotton, linen, or polyester blends.