Yes, black fiberglass tissue can be used as a filter material. It is known for its high tensile strength and resistance to chemicals, making it suitable for air and liquid filtration applications. However, it's important to note that fiberglass may not be suitable for all types of filtration due to potential health risks associated with inhalation of fibers and the need for specific conditions to prevent degradation. It is often used in industrial settings for filtering particulates and in HVAC systems. Always ensure that the use of fiberglass tissue complies with safety standards and the specific requirements of the filtration task at hand.