Yale Press has produced the revised Yale Tint Book, a guide to the creation of over 19,400 colours, and has offered to give the guide (usual cost £200) to certain Macworld readers for free.

The guide, using the four basic process colours - cyan, magenta, yellow and black (CMYK) - includes sample duotones and examples of percentage printing to help designers select the right intensity for backgrounds and images used in their work.

To qualify for a free Tint Book, visit the company’s Web site.