Pre-treatment fixing fluid for an offset coated medium
AssigneeHewlett-Packard Development Company, L.P.
InventorsKeshava A. Prasad, Ali Emamjomeh, George Sarkisian, Fereshteh Khorrami
Life of this patent
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Abstract
An example of a pre-treatment fixing fluid for an offset coated medium includes calcium propionate, calcium pantothenate, tetraethylene glycol, a surfactant having an HLB less than 10, an acid, and a balance of water. The calcium propionate is present in an amount ranging from greater than 4.5 wt % to 8.0 wt %, the calcium pantothenate is present in an amount ranging from about 2.0 wt % to equal to or less than 15 wt %, and the surfactant is present in an amount ranging from about 0.01 wt % to about 1.0 wt %, each based on the total wt % of the pre-treatment fixing fluid. The acid is present in an amount sufficient to render the pH from about 4.0 to about 7.0.
Claims13
A pre-treatment fixing fluid for an offset coated medium, comprising:
- calcium propionate present in an amount ranging from greater than 4.5 wt % to 8.0 wt % based on a total wt % of the pre-treatment fixing fluid;
- calcium pantothenate present in an amount ranging from about 2.0 wt % to equal to or less than 15 wt % based on the total wt % of the pre-treatment fixing fluid;
- tetraethylene glycol;
- a surfactant having an HLB less than 10 present in an amount ranging from about 0.01 wt % to about 1.0 wt % based on the total wt % of the pre-treatment fixing fluid;
- an acid present in an amount sufficient to render a pH of the pre-treatment fixing fluid from about 4.0 to about 7.0;
- and
- a balance of water.
An ink fixing system, comprising:
- an offset coated medium;
- and
- a pre-treatment fixing fluid to be applied to a surface of the offset coated medium, the pre-treatment fixing fluid including:
- calcium propionate present in an amount ranging from greater than 4.5 to about 8.0 wt % based on a total wt % of the pre-treatment fixing fluid;
- calcium pantothenate present in an amount ranging from about 2.0 wt % to equal to or less than 15 wt % based on the total wt % of the pre-treatment fixing fluid;
- tetraethylene glycol;
- a surfactant having an HLB less than 10 present in an amount ranging from about 0.01 wt % to about 1.0 wt % based on the total wt % of the pre-treatment fixing fluid;
- an acid present in an amount sufficient to render a pH of the pre-treatment fixing fluid from about 4.0 to about 7.0;
- and
- a balance of water;
- a dynamic surface tension of the pre-treatment fixing fluid being lower than a surface energy of the offset coated medium so that when the pre-treatment fixing fluid is applied on the surface of the offset coated medium a contact angle between the pre-treatment fixing fluid and the offset coated medium is 0.
A printing method, comprising:
- depositing onto a coated offset medium, a pre-treatment fixing fluid including:
- calcium propionate present in an amount ranging from greater than 4.5 to about 8.0 wt % based on a total wt % of the pre-treatment fixing fluid;
- calcium pantothenate present in an amount ranging from about 2.0 wt % to equal to or less than 15 wt % based on the total wt % of the pre-treatment fixing fluid;
- tetraethylene glycol;
- a surfactant having an HLB less than 10 present in an amount ranging from about 0.01 wt % to about 1.0 wt % based on the total wt % of the pre-treatment fixing fluid;
- an acid present in an amount sufficient to render a pH of the pre-treatment fixing fluid from about 4.0 to about 7.0;
- and
- a balance of water;
- whereby the deposited pre-treatment fixing fluid spreads horizontally on the coated offset medium;
- and
- while the pre-treatment fixing fluid is still wet on the medium, depositing an ink including an anionically dispersed pigment onto the pre-treatment fixing fluid.
Dependencies are inferred from the claim text.