RAPI Mill newest product update Silverpak PLUS: The new version of Silverpak delivers a brighter, more neutral undertone compared to its predecessor. This new version makes it easier to color match for printing purposes. Produced in the ever integrated Kerinci Mill, Riau, APRIL Group’s newly updated version of the Ivory GC1 Silverpak line is updating their Ivory characteristic into one that is both versatile and solid in printability. A type of paperboard that is specifically designed for high-quality printing and graphic applications. It is known for its smooth, glossy surface on both sides, which allows for excellent ink adhesion and vibrant colour reproduction.