Ink composition and method of making and using such composition
AssigneeDeluxe Corporation
InventorThomas J. Pennaz
Life of this patent
Estimating the term…
Abstract
An ink composition comprising a water reducible resin and a compatible surfactant wherein the ink composition is water insoluble under certain pH conditions and selectively water washable under certain other alkaline pH conditions. The method aspect of the present invention relates to a method of making and using the ink composition.
Claims15
An oil based ink composition comprising an ink varnish having a resin component, an oil component and a surfactant component wherein said oil resin and surfactant components are compatible with one another and said resin component includes a first resin component which is substantially water insoluble and a second resin component which is compatible with said first resin component and which comprises a water reducible resin whose water solubility is pH dependent, said second resin component and said surfactant component being present in said ink varnish in an amount sufficient to cause the ink varnish to be substantially water insoluble at acid pH levels and water washable at alkaline pH levels, said second resin component further being present in an amount of at least 2% by weight of said ink varnish and said surfactant further being present in an amount of at least 1% by weight of said ink varnish.
An oil based composition for use in a lithographic printing system comprising an ink varnish having a resin component, an oil component present in an amount of at least 2% by weight of said ink varnish and a surfactant component present in an amount of at least 1% by weight of said ink varnish, each compatible with one another wherein said resin component includes a first resin component which is substantially water insoluble and a second resin component which is compatible with said first resin component and which comprises a water reducible resin whose water solubility is pH dependent, said composition being substantially water insoluble at acid pH levels and water washable at alkaline pH levels.
An ink varnish for use in a lithographic ink composition comprising a resin component including a first resin component which is water insoluble and at least 2% by weight of a second resin component which is substantially water insoluble at acid pH levels and water washable at said alkaline pH levels and about 1%-20% by weight of a compatible surfactant.
A method for making a lithographic ink varnish comprising the steps of combining an oil component, a compatible resin component and a compatible surfactant component, wherein said resin component includes a water insoluble portion and a solubility controlling portion, said solubility controlling portion being substantially water insoluble at an acid pH and water washable at an alkaline pH and being present in an amount of at least 2% by weight and said surfactant being present in an amount of at least 1% by weight.
Dependencies are inferred from the claim text.