In May 2010, the PANTONE PLUS SERIES was introduced, which is a sweeping upgrade to the PANTONE MATCHING SYSTEM, including the addition of 224 brand-new colors, new paper stocks, and a new chromatic re-arrangement of the colors. As part of this upgrade the guides and books on Matte coated paper were discontinued. PANTONE Color Manager software is offered free of charge to purchasers of any PANTONE PLUS SERIES products, allowing for digital update of PANTONE libraries within licensed software applications.
C = coated paper, i.e., PANTONE 185 C, U = uncoated paper, i.e., PANTONE 185 U
Tunc from SPK pipe and fitting factory in Instanbul answered