... Grey board 2mm. 2.5mm. 3mm, 3.5mm, 4mmPrinting typeOffset Printing , screen printingPrinting ColorFull color or pantone(1c/1c ,2c/2c,3c ... will produce as per your request, material, size, quantiy, color, printing, surface disposal , packaging etc. If you have no ideal about ... any products containing this/these marks. If you are interested in cartoon coloring book, please kindly to inform us more details ...