Ultramarine :
Lapis lazuli has been mined for centuries from a location still in use today in the mountain valley of Kokcha, Afghanistan. First mined 6,000 years ago, the rock was transported to Egypt and later to Europe where it was used in jewelry and paint pigment. Since the 19th century, ultramarine has been manufactured artificially. Ultramarine blue is a historical pigment having been found in Egyptian tomb paintings.
The finest blue known to the ancients, was obtained from (12 cetury, artificial ( 1828) the precious stone lapis lazuli (lazurite), a costly mineral. The mineral lazurite is a complex sodium calcium aluminum silicate sulfate.
Pigments in acrylics :
Acrylic is an appealing medium because of its versatility. When it is watered down, acrylic paint can become thin and watery like watercolors. Acrylic paint can also be applied thickly, mimicking the appearance of oil paints.
Acrylic paint consists of pigment suspended in a binder of acrylic polymer emulsion. Water is the vehicle for the acrylic polymer emulsion.
