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Cochineal dye was extensively used in the Pre-Columbian era, often for ceremonial textiles and those worn by rulers. [24]: 12–25 The dye bonds best with animal fibers rather than plant fibers and was most effective for dying wool from alpacas and other Camelidae, rabbit fur, and feathers. It was also used on cottons and plant-based fabrics ...
Crocus display the general characteristics of family Iridaceae, which include basal cauline (arising from the aerial stem) leaves that sheath the stem base, hermaphrodite flowers that are relatively large and showy, the perianth petaloid with two whorls of three tepals each and septal nectaries.
Cobalt blue is a blue pigment made by sintering cobalt(II) oxide with aluminium(III) oxide (alumina) at 1200 °C. Chemically, cobalt blue pigment is cobalt(II) oxide-aluminium oxide, or cobalt(II) aluminate, CoAl 2 O 4.
The dye was very expensive; a great quantity of gall-nuts were needed for a very small amount of dye. The gall-nuts which made the best dye came from Poland, eastern Europe, the near east and North Africa. Beginning in about the 14th century, dye from gall-nuts was used for clothes of the kings and princes of Europe. [47]
A leuco dye (from the Greek λευκό leuko: white ) is a dye which can switch between two chemical forms, one of which is colorless. Reversible transformations can be caused by heat, light or pH , resulting in examples of thermochromism , photochromism and halochromism , respectively.
Raphael was a master of this technique, carefully balancing the reds and the blues so no one colour dominated the picture. [73] Ultramarine was the most prestigious blue of the Renaissance, being more expensive than gold. Wealthy art patrons commissioned works with the most expensive blues possible.
Pink is the color [2] of a namesake flower that is a pale tint of red. [3] [4] It was first used as a color name in the late 17th century. [5]According to surveys in Europe and the United States, pink is the color most often associated with charm, politeness, sensitivity, tenderness, sweetness, childhood, femininity, and romance.
A red octagon symbolizes "stop" even without the word. Wearing variously colored ribbons is a symbolic action that shows support for certain campaigns.. A symbol is a mark, sign, or word that indicates, signifies, or is understood as representing an idea, object, or relationship.