GMG has introduced GMG InkOptimizer 4.6, which significantly reduces CMY color ink use, replacing it with additional black ink to maintain sharpness, reduce ink volumes, and improve print quality. While images remain identical to the naked eye, the amount of color ink used is significantly reduced—promising ink savings of up to 25 % on press. Make-ready is faster and waste is reduced. Version 4.6 includes integration of the Adobe PDF Library, guaranteeing the correct interpretation of PDF files. PDF files can now be flattened, and transparent and overprinting elements yield identical results as in the Adobe Acrobat reference software. The Adobe PDF Library and the possibility of reducing transparencies mean a massive increase in production reliability.