Engraving; engraving of embossing rolls; embossing of words, designs, images, numbers and diffraction patterns on calenders; laser engraving of materials in submicron, micrometric or macrometric sizes for aesthetic, technical, physical or safety purposes; embossing on all media, including thin sheets, namely, embossing words, designs, images, numbers and diffraction patterns on plastic, metals, cardboard, leather, metal coated papers, aluminum foils, tipping papers, hybrid foils and plastic f...