Fastness Retention of color by carpets and other materials. Flagged Fibers Brush or broom fibers that are split at the end to increase cleaning efficiency. The ability of a material to ignite easily and burn quickly. Also used to classify some liquids based on their flash point. The top layer of protective floor coatings.
Examples are mold, mildew, yeast and mushrooms.
Fungicide Chemical agent that destroys fungi. Hardness A measure of hard water. The amount of dissolved calcium and magnesium salts measured in parts per million in a gallon of water. Grout Matrix between ceramic tile on walls and floors. Hard Water Water containing soluble salts of calcium and magnesium and sometimes iron.