Sintra® material is often screen printed when used in the signage and display industry. Identifying a quality ink for your project is crucial for great results.
Although it would be impossible for any one to run a trial using all of the different types of inks available, 3A Composites has coordinated testing with these ink suppliers using several different inks on Sintra®.
Certain inks vary in their properties and performance in various applications. 3A Composites recommends that you consult with the ink manufacturer if there are any questions regarding the use of a particular ink and to test any application prior to initiating a production run.
Temperatures in excess of 150°F may cause warping or bowing of Sintra® material. Solvent based inks should be allowed to air dry instead of being heat dried. UV curing ovens should be adjusted to keep the temperature of the printed sheet below 150°F.
When using UV inks the amount of exposure to the UV energy should be kept to a minimum. The combination of high UV energy and thin gauges of Sintra® can result in a brittleness of the printed piece. This brittleness is magnified for multiple colors and passes through the UV curing oven. Use just enough energy to cure the ink and not over-cook the Sintra®.
Surface Preparation of Sintra Prior to Screen-Printing.
The surface to be printed must remain dry, clean and grease free. Any surface scratches on the Sintra® will have a tendency to telegraph through the ink. In order to remove small scratches or dents, rapidly fan a heat gun over the affected area. Care must be taken not to leave the hot air in one place for too long, as the surface can be deformed.
It is highly recommended that the surface be cleaned with a rag moistened with isopropyl alcohol prior to printing.