Digital Printing Using Transparent Base Ink
A technology of digital printing and ink, applied in the direction of ink, printing, electrical recording process using charge graphics, etc., can solve the problems of hours-consuming, unsuitable, low productivity of 3D printing machines, etc., to improve productivity, save costs, and protect the environment The effect of friendly costs
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Examples
example 1
[0313] Example 1 - Blank Ink Containing Water and Glycol
[0314] A blank ink formulation was formed for a Kyocera piezoelectric printhead designed for inks with a viscosity of 5-6 cps. 60.8% deionized water was mixed with 38.0% polyethylene glycol PEG400, 1.0% Surfynol wetting agent and 0.2% Actidice MBS for bacterial and fungal control.
example 2
[0315] Example 2 - Dry Fiber Based Ink
[0316] The dry ink powder was prepared by mixing 20% by weight spray-dried melamine formaldehyde resin particles, 20% dark brown pigment and 60% pine wood fibers (average length about 0.2mm and thickness about 0.05mm) have to. The mixture was applied as a 1 mm thick layer on the steel belt by means of a spreading device. Thereafter the powder mixture is heated and moisture is applied by steam from deionized water. The mixture is dried by hot air, resulting in a hard and stable powder-based surface layer with a semi-cured melamine binder. The dry layer was removed from the belt by scraping and the dry wood particles coated with pigment and melamine resin were ground and sieved into dry ink colorants of a size similar to that of individual wood fibers. A dry ink comprising a colorant is obtained with a wood fiber body and a surface covered by pigment bound to the fibers by a semi-cured melamine resin.
[0317] Example 3 - Digital Bi...
Embodiment
[0322] 1. A method of forming a digital print P on a surface 2, wherein said method comprises the following steps:
[0323] Applying a colorant 7 to said surface 2;
[0324] • bonding a portion of the colorant to the surface 2 with an adhesive 11; and
[0325] • Removal of unbound colorant 7 from said surface 2 such that a digital print P is formed by said bound colorant 7 .
[0326] 2. The method as described in embodiment 1, wherein the colorant 7 comprises a pigment 12 mixed with the binder 11 .
[0327] 3. The method as described in embodiment 1 or 2, wherein the binder 11 comprises a thermosetting resin.
[0328] 4. The method according to any one of the preceding embodiments, wherein the adhesive 11 comprises a thermoplastic resin.
[0329] 5. The method according to any one of the preceding embodiments, wherein the binder 11 is a powder.
[0330] 6. The method according to any one of the preceding embodiments, wherein the surface 2 is a paper layer or a foil.
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Abstract
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