Dye for coloring cigarette paper
AssigneeBrown & Williamson Tobacco Corporation
InventorsFrank K. St. Charles, John H. Lauterbach, Li-Chung Chao, Jiunn-Yann Tang, Baran B. Chakraborty, Andrew McMurtrie
Life of this patent
Estimating the term…
Abstract
A dye for coloring cigarette paper a brown color which includes caramel as the brown coloring agent, a plasticizer to prevent the paper from becoming brittle, and water. The dye can further include carmine as a red coloring agent to change the shade and hue of the brown color of the caramel. The dye can further include a burn additive to promote the burning of the dyed paper if needed.
Claims32
A dye for coloring cigarette wrapper paper comprising:
- purified caramel;
- a plasticizer to prevent the paper from becoming brittle;
- and,
- water.
A dye for coloring cigarette wrapper paper comprising:
- from about 3 weight percent to about 20 weight percent purified caramel;
- from about 2 weight percent to about 8 weight percent glycerine;
- and,
- from about 72 weight percent to about 95 weight percent water.
A process for purifying caramel color comprising the steps of:
- prefiltering the caramel color extract to remove particulate matter above a predetermined size;
- diluting the resulting prefiltered extract;
- as permeate is removed by the diafiltering step, adding a volume of deionized water to the diafiltering step equal to the volume of permeate removed to provide a resulting retentate;
- and,
- spray drying the resulting retentate to provide a purified caramel powder product.
A filter cigarette product comprising:
- a filter attached to one end of a tobacco rod, said tobacco rod circumscribed by a paper wrapper having a dye therein purified comprising caramel, a plasticizer to prevent the wrapper from becoming brittle, and water.
Dependencies are inferred from the claim text.