All my illustrations are printed for me by The Printspace, a London-based company who produce high-quality work in both C-Type and Giclée colour on a variety of archival quality papers. Archival means a life of at least 80-100 years. The print costs for this service are not cheap and account for a high proportion of the prices for the illustrations.
Giclée is a form of inkjet printing, one which uses far more ink colours than conventional inkjets, and at a very high resolution - hence the superb quality of the prints. The "clipping" on the left is a highly magnified section of a window in the Post House Café painting (done in "chalk"). A print of this would show the colour and texture exactly but with a resolution of 300 dots per inch (DPI), as opposed to the usual screen resolution of 72dpi.
As for paper, I use Hahnemuhle German Etching Paper for most of the prints, which is very heavy, fine quality paper. Some prints are done on Hahnemuhle Bamboo, which is similar but slightly smoother and lighter.