A Canon PGI-29 Chroma Optimizer is used to reduce metamerism on coated papers to give a smoother, more even finish that lasts. The Chroma Optimizer reduces the gap in height from one ink droplet to the next which in turn produces a much smoother ink layer. This smoothness lends itself to more evenly reflected light, increased colour saturation and an improvement in the deepness of blacks. This cartridge is intended for use with the Canon Pixma Pro-1 printer and is part of the larger set that is also available to buy at Just Ink and Paper.