COLORING FRANKFURT SAUSAGE CASINGS (Copyrighted by B. Heller & Co.; Reprint Forbidden.)
Reading edition
Follow the directions given on page 117 for momentary dipping.
If a deep color is desired, slightly increase the amount of Zanzibar-Carbon Brand Mixture. You must use your own judgment in producing the right color desired, as the drier the casing the less Zanzibar-Carbon Brand Mixture it takes and the better the color will be.
Always be particular not to smoke with too much heat in the smoke house, so that the grease does not melt in the sausage and come through the casing.