Decoration Cylinder Pressure and it’s Influence on the Hue Variation of Ceramic Tiles Decorated by the Laser Engraving Silicone Cylinder Method

Abstract

Several factors can influence the hue variation of tiles through contact elements; the pressure on the surface to be decorated is an important feature. This paper studied this variable applied to decoration by silicone cylinders. A variation of height was made between the cylinder and the tile. The influence of the feature is linked to cylinder wear and distance decrease. The reflectance, as well as the shape and filling of the decorated dots of gray scale values (5, 25 and 85%) were analyzed; the heights studied were 0.8; 1.0; 1.3 and 1.5mm. A similar behavior was observed in the engraving studied; in low shades of gray the reflectance decreases with increasing pressure and then becomes directly proportional; in the middle and high tones range the general trend was an increase in reflectance with increasing pressure on the ceramic tile.