The cost to produce black fiberglass tissues varies and depends on several factors including the raw material costs, production scale, labor, energy consumption, and market demand. Fiberglass itself is made from silica sand, which is melted and spun into fine fibers. The addition of color, in this case, black, will add to the cost. However, without specific details on the production process, quantity, and current market prices for materials and labor, it's challenging to provide an exact figure. Generally, the cost can range from a few dollars to tens of dollars per square meter, but this is a rough estimate and actual costs may differ significantly.