El Greco Iconography Pigment - Deep Blue Ultramarine - 100gr

• Color Name
  Deep Blue Ultramarine
• No.
  45
• Manufacturer
  El Greco
• Product Type
  Dry Pigments
• Barcode
  5212016643682
• Color Family
  Blue
• Paco code
  8311364
• Size
  100gr
• SKU
  ELGREC-400.100-45
• Description
  Dry Pigment

Πληροφορίες Χρωστικής

• Pigment Name
  PV23-Dioxazine Violet
• Pigment type
  organic
• Chemical Name
  carbazole dioxazine
• Chemical Formula
  C34H22Cl2N4O2
• Properties

  Dioxazine Violet is transparent and has very high tinting strength. It is a staining pigment, very dark valued when it is used at full strength. Concentrated, it paints out nearly black, but it mixes with Titanium White to form bright, opaque tints of purple. PV23 produces slightly redder shades than PV37. Because the hue can vary with the conditions of preparation and grinding, it may be offered in red shade, blue shade, and so forth.

• Permanence

  Dioxazine Violet has good lightfastness. There may be some concern about it fading or shifting in color in tints and washes. Some artists have reported that PV37, a molecular variant, is more lightfast than PV23.

• Toxicity

  
  

• History

  Two molecular variants of Dioxazine Violet, PV23 and PV37, are available. They have similar properties, but mix slightly differently.

• Pigment Name
  PB29-Ultramarine [Blue]
• Pigment type
  inorganic
• Chemical Name
  complex silicate of sodium and aluminum with sulfur
• Chemical Formula
  Na8-10Al6Si6O24S2-4 or Na6-8Al6Si6O24S2-4
• Properties

  Ultramarine is the standard warm blue, a brilliant blue pigment that has the most purple and least green in its undertone. It has a moderate to high tinting strength and a beautiful transparency. Synthetic Ultramarine is not as vivid a blue as natural Ultramarine. Ultramarine dries slowly in oil and tends to produce clean, though granular, washes in watercolor. French Ultramarine mixes well with Alizarin colors in oil and watercolor form to create a range of purples and violets. It can dull when mixed with white in acrylic form, but mixes well with other colors. The shade varies based on manufacturer. Considered a great color for glazes, it is not suitable for frescoing.

• Permanence

  Ultramarine has excellent permanence, although synthetic Ultramarine is not as permanent as natural Ultramarine. It may discolor if exposed to acid because of its sulfuric content.

• Toxicity

  Ultramarine has no significant hazards.

• History

  The name for this pigment comes from the Middle Latin ultra, meaning beyond, and mare, meaning sea, because it was imported from Asia to Europe by sea. It is a prominent component of lapis lazuli and was used on Asian temples starting in the 6th century. It was one of the most expensive pigments in 16th century Europe, worth twice its weight in gold, and so was used sparingly and when commissions were larger. Ultramarine is currently imitated by a process invented in France in 1826 by Jean Baptiste Guimet, making blue affordable to artists and extending the range of colors on their palettes.

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