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US 6,854,387 B2Granted
Method of color printing packaging container stock
AssigneeWeyerhaeuser Company
InventorsDavid L. Lee, Amar N. Neogi
Life of this patent
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AssigneeWeyerhaeuser Company
InventorsDavid L. Lee, Amar N. Neogi
Estimating the term…
A method of color printing on packaging containers using transparent colors is described. The method is limited to the use of no more than two of the primary process colors. For many images primary process colors are not needed at all. Preferably, only two transparent inks will be used. In some cases an opaque ink may be applied first as a masking image underlying a part or all of the transparent ink overprint. In other cases the opaque ink may be applied last as a masking print over part of the image. The method can be used on any substrate color but it is particularly useful on dyed papers or unbleached kraft brownboard. While color reproduction is not totally accurate, nor is this expected in a colorimetric sense, surprisingly attractive and realistic images generally faithful to the original are attainable.
A method of printing packaging container stock having inner and outer surfaces which comprises printing directly on the outer surface of the stock in color using at least two overprinted transparent inks, of which no more than two of the inks have been selected from the cyan, magenta or yellow process primary colors, and forming the printed container stock into a packaging container,
A method of printing packaging container stock having inner and outer surfaces which comprises printing directly on the outer surface of the stock in color using at least two overprinted transparent inks, of which no more than two of the inks have been selected from the cyan, magenta or yellow process primary colors, and forming the printed container stock into a packaging container,
The method of 14 in which the opaque ink serves as a masking color and is applied to the container stock before or after the transparent inks are applied.
Dependencies are inferred from the claim text.