Applied test methods for PrintoLUX® certified materials
The PrintoLUX® process works with water-based and environmentally friendly inks and delivers a print image in photorealistic display quality. With hp inks (hp stands for "higher pigmented") all colour tones defined by RAL/Pantone can be simulated.
As a great advantage, our customers also experience the precision of the representations on small sign formats as a result of the increasing miniaturisation of signs.
Thus, the marking of DataMatrix codes in the format 2.5 mm x 2.5 mm is not unusual for us. It is in demand from some industrial customers and allows the code to be easily removed with a smartphone.
All components of the process have undergone extensive testing before being used. Our marking systems in particular embody the performance and reliability of "Made in Germany".
We carry out quality assurance on all PrintoLUX®-certified materials prior to storing and/or processing them to make sure they meet our labelling process’ stringent demands
Directly after test patterns have cooled down they undergo a cross-cut test as per DIN EN ISO 2409:2007 to verify the print’s adhesion. For this purpose, we cut a tight grid into the surface and brush it off. Then we apply Tesa® adhesive tape 4651 to the grid and quickly remove it again after having left it to settle for five minutes. The best possible result: cut edges are smooth and there is no peeling. Materials only meet our quality guidelines if samples achieve this category GT 0 result.
We then put materials through a scratch resistance test using a pencil with a degree of hardness of 6. As part of this test,
printed test areas are processed a minimum of six times from left to right using a sharpened pencil and a pressure of
10 Newton (10 kg*m/s²) at an angle of 90 degrees. After this test no ink must have peeled off to meet quality standards.
A comprehensive test series analysing the resistance to a series of chemicals represents the last step of goods inwards inspections. In this process, isopropanol, acetone, cellulose thinner, concentrated soda solution and vinegar essence (25%) are used. The test surface is processed with the relevant chemical as part of 50 abrasive cycles at an abrasive pressure of
20 Newton (20 kg*m/s²) from left to right. Materials pass the goods inwards inspection if there are no visual changes of the printed colours after the tests.
After having successfully completed tests our quality assurance staff approves the materials. Each approved batch is assigned a batch card number. Test specimen and retention samples are archived with this number. The batch card number has also been included on the delivery slips of the panel material and sheet boxes supplied to retail.