Selective overcoat
Examples described herein include examples methods for generating varnish knockouts that include applying a fixer material to a surface of a print medium, selectively applying a print material over the fixer material to form an image, and applying an overcoat material to form a durable coating on areas over the image and a nondurable coating over other areas of the surface.
1. A system comprising:
a fixer applicator to apply a fixer material to a region of a print medium
a print engine to apply selectively a print material to sub regions of the region over the fixer material; and
an overcoat applicator to apply an overcoat material over the fixer material and the print material in the region;
wherein the fixer material prevents the print material from penetrating the print medium, and prevents the overcoat material not in the sub regions from forming a durable coating.
2. The system of claim 1 further comprising a component that is one from the set consisting of a dryer to condition the overcoat material in direct contact with the fixer material into a nondurable layer and a cleaning element to remove the overcoat material from the areas of the regions not in the sub region.
3. The system of claim 2 wherein the component is a first component and is a cleaning element, and further comprising a second component that is a dryer to condition the overcoat material in direct contact with the fixer material into a nondurable layer.
4. The system of claim 3 wherein the nondurable layer comprises a powder.
5. The printing system of claim 2 wherein the component is a first component and is a dryer, and further comprising a second component that is a cleaning element to remove the overcoat material from the areas of the regions not in the sub region.
6. The printing system of claim 1 further comprising a media handler.
7. A method comprising:
applying a fixer material to a surface of a print medium;
selectively applying a print material over the fixer material to form an image; and
applying an overcoat material to form a durable coating on areas over the image and a nondurable coating over other areas of the surface.
8. The method of claim 7 wherein the nondurable coating is formed in the other areas due to an interaction between the fixer material and the overcoat material.
9. The method of claim 7 wherein the fixer material comprises a salt solution.
10. The method of claim 7 further comprising removing the nondurable coating from the other areas of the surface.
11. The method of claim 10 wherein removing the nondurable comprises treating the print media with a blower, a brush, a sponge, a roller, or a vacuum.
12. The method of claim 10 further comprising applying an adhesive or a second print material to some of the other areas of the surface.
13. A printing system comprising:
a controller;
a non-transitory computer readable medium comprising executable code that when executed by the controller cause the controller to control:
a fixer applicator to apply a fixer material to a region of a print medium
a print engine to apply selectively a print material to sub regions of the region over the fixer material;
an overcoat applicator to apply an overcoat material over the fixer material and the print material in the region; and
a dryer to condition the overcoat material in direct contact with the fixer material into a nondurable layer.
14. A printing system comprising:
a controller;
a non-transitory computer readable medium comprising executable code that when executed by the controller cause the controller to control:
a fixer applicator to apply a fixer material to a region of a print medium
a print engine to apply selectively a print material to sub regions of the region over the fixer material;
an overcoat applicator to apply an overcoat material over the fixer material and the print material in the region;
wherein the fixer material prevents the print material from penetrating the print medium, and prevents the overcoat material not in the sub regions from forming a durable coating.
15. The system of claim 1 , further comprising a dryer to condition the overcoat material in direct contact with the fixer material into a nondurable layer.
16. The system of claim 15 , further comprising a cleaning element to remove the overcoat material from the areas of the regions not in the sub region.
17. The system of claim 15 , wherein the nondurable layer comprises a powder.
18. The system of claim 1 , further comprising a cleaning element to remove the overcoat material from the areas of the regions not in the sub region.
19. The system of claim 18 , wherein the nondurable layer comprises a powder.