Abstract: A process for preparing transparent Pigment Yellow 138 by grinding Pigment Yellow 138 in the presence of a grinding agent, preparing an aqueous slurry of the ground particles, and filtering the slurry resulting in a filter cake containing particles of transparent Pigment Yellow 138. In addition, a process for improving color strength of an ink and/or plastic composition is also disclosed by adding transparent Pigment Yellow 138 to the composition.

Abstract: A system which enables electronic communication, coordination and dissemination of color-related designs, specifications and products. Color production and maintenance in a simultaneous fashion is provided between a plurality of disparate parties in substantially “real time.” The present integrated color-production is capable of importing electronic output from many diverse instruments, including color production-related hardware and software, and further uses the output to automatically deliver product data to and from a plurality of geographically disbursed parties. The present invention also provides an electronic library comprising colors and textures to be used for accurately matching a color sample and/or specification. The integrated, on-line color-related production system of the present invention enables parties to operate at peak efficiency, producing high sales and customer satisfaction.