

South Africa 2009 "Dinosaurs"
This set of self-adhesive dinosaur stamps is the first ever with a 3D effect to be issued by the South African Post Office. It will also be the first time that a pair of viewing glasses will be supplied with each stamp sheet and commemorative cover.
The method used to create this effect, is known as an anaglyph. An anaglyph is a stereo image that requires special glasses with red and green (or blue) lenses for 3D viewing. To achieve the effect, two views of a picture are printed in two colours, usually red for the left eye and blue or green for the right eye.