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
Trooping the Colour year emphasise the Queen's knowledge of the attributes of her guards, and single out "steadiness" as a highly prized quality for a guardsman. The accompanying marches always carry a flavour of the regiment whose colour is being trooped, lending the royal inspection a unique atmosphere. For example, if the Welsh Guards are trooping their colour, the music will include their traditional regimental march, "Men of Harlech". While the Queen passes the six companies of foot guards on her left, a slow march or air is played. Once the phaeton turns around the rear of No. 6 Guard, the music changes