Uflex has become the first Indian company to manufacture a glitter printing rotogravure cylinder on its direct laser engraving line. Pigments of glitter ink are substantially bigger in size compared to conventional gravure inks, therefore rotogravure printing on substrates using such inks has always been a challenge for converters.

“It is extremely difficult for a cylinder with electro-mechanically engraved conventional gravure cells to pick up pigments of the glitter ink and transfer them on to the substrate, therefore in the case of this specialized cylinder, we developed bigger sized customized pits (cells) that trap the high solid content of the glitter ink,” explains P.K. Agarwal, joint president of cylinders at Uflex. “The customization of cell geometry of the rotogravure cylinder on our direct laser engraving line is the real innovation here. Pigments of the glitter ink have a tendency to get stuck inside the pits/ cells of the cylinder (cell filling). When the printing surface is sandwiched between the impression roller and the gravure cylinder, the high solid contents of the glitter ink get transferred from recessed cells to the substrate with the help of capillary action and the tangential force of the roller.