Detailed Water Transfer Technology - Process (2)

â–² 2. Water mark transfer process

(1) Environmental factors

The clean substrate surface is a necessary condition for high-quality transfer, which is the same for any printing process. Before printing, it is necessary to ensure that the substrate is completely exposed. In addition, a clean and tidy working environment is conducive to the transfer of the ink layer tightly adhered to the surface of the substrate. The floating dust in the air is most likely to affect the transfer effect.

(2) Water mark transfer paper activation

The water mark transfer paper is divided into a peelable water mark transfer paper and a dissolved water mark transfer paper, and the graphic of the peelable water mark transfer paper can be separated from the base material after being activated to achieve the transfer; After the transfer paper is activated, the substrate is dissolved in water and the image is in a free state to effect transfer.

The activation of the water mark transfer paper is different from the activation of the water transfer transfer film. It merely immerses the transfer paper in water and separates the graphic from the substrate without special solvents, as shown in Figure 5.

The process is simpler.

The specific process is to first cut the water transfer printing paper that needs to be transferred into the required specifications, put it into a clean water tank, and soak it for about 20 seconds to separate the mask from the substrate and prepare it for the transfer.
Water standard transfer paper processing process shown in Figure 6,

Remove the water transfer paper lightly close to the surface of the substrate, scrape the graphic surface with a squeegee, so that the water out, keep the text flat in the prescribed location, for natural drying. For the peelable water mark transfer paper, it is naturally dried and dried in an oven to increase the attachment fastness of the graphic and text, and the drying temperature is about 100°C. Because there is a layer of protective varnish on the surface of the peelable water transfer paper, there is no need to spray protection. However, there is no protective layer on the graphic surface of the soluble water transfer paper, and it needs to be treated with a varnish after being naturally dried. The UV varnish must be cured with a curing machine. When spraying varnish, be sure to prevent dust from falling on the surface, otherwise the appearance of the product will be greatly affected. The control of the coating thickness is achieved by adjusting the viscosity and spray amount of the varnish, and spraying too much can easily cause a decrease in the uniformity. For substrates with larger transfer areas, applying screen printing for glazing to obtain thicker coatings is also a very effective protective measure.

(to be continued)