Tyrian purple sea salt in the dye vat and adding potash, he was able to successfully dye wool a deep purple colour. Recent research in organic electronics has shown that Tyrian purple is an ambipolar organic semiconductor. Transistors and circuits based on this material can be produced from sublimed thin-films of the dye. The good semiconducting properties of the dye originate from strong intermolecular hydrogen bonding that reinforces pi stacking necessary for transport. True Tyrian purple, like most high-chroma pigments, cannot be accurately rendered on a standard RGB computer monitor. Ancient reports are also not entirely consistent, but these swatches give a
Edward VII 2d Tyrian plum Edward VII 2d Tyrian plum The two pence (2d) Tyrian plum was a postage stamp produced by Britain in 1910 as a replacement for the existing two colour 2d stamp of King Edward VII. One hundred thousand sheets, totalling 24,000,000 stamps, were printed and delivered to the post office stores for distribution to postmasters. The circulation of the new stamps was delayed while existing stocks of the current stamp were used up so that the change would take effect at one time and the amount of surplus stock of the old value would be kept to a minimum. However following