A consumable packaging composition is provided for packaging clear-binders, made of one or several packaging materials, alone or in combination, such as plastics, polymers and extenders, and which melting point is adjusted so that the packaging material melts when in contact with the hot aggregates as methods of using them, are also disclosed. The new enzyme is a non-selfdegrading endoprotease. The advantages include a much wider pull-in range for frequency acquisition, and an accurate and robust measure of a quality of received data. The second priority level is different than the first priority level. The front cover unit can comprise a front surface cover member and a rear surface cover member.