e/Turnsole

Information
has gloss	eng: Turnsole or folium was a dyestuff prepared from the annual plant Crozophora tinctoria ("dyers crook carrier", from its use and the curved tip of its spike of florets). History Turnsole became a mainstay of medieval manuscript illuminators starting with the development of the technique for extracting it in the thirteenth century, when it joined the vegetal-based woad and indigo in the illuminators repertory. However, the queen of blue colorants was always the expensive lapis lazuli or its substitute azurite, ground to the finest powders. According to its method of preparation, turnsole produced a range of translucent colors from blue, through purple to red, according to its reaction to the acidity or alkalinity of its environment, in the chemical reaction, not understood in the Middle Ages, that is most familiar in the Litmus test.
lexicalization	eng: turnsole
instance of	(noun) a digestible substance used to give color to food; "food color made from vegetable dyes" food color, food colour, colouring, food colouring, food coloring, coloring

Media
media:img	ChrozophoraTinctoria.JPG
media:img	Hvalov zbornik1.jpg