Illustrative of the Water-soluble fillers operable in the present invention are inorganic salts such as the chlorides of sodium, potassium, and calcium; acetates such as those of sodium, potassium, calcium, copper and barium; sulfates such as those of sodium, potassium and calcium; phophates such as those of sodium and potassium; nitrates such as those of sodium and potassium; carbonates such as t