Iconography Pigment No 235 - Bohemian Green Earth - 50gr KREMER

• Manufacturer
  Kremer
• Product Type
  Dry Pigments
• Barcode
  4081000000258
• Color Family
  Green
• Paco code
  9851060
• No.
  235
• Size
  25gr
• SKU
  SKONES-235-25
• Color Name
  Πράσινο της Γης T FR ***
• Description
  Dry Pigment

Πληροφορίες Χρωστικής

• Pigment Name
  PG23-Green Earth
• Pigment type
  earth
• Chemical Name
  hydrated iron, magnesium, aluminum and potassium silicates
• Chemical Formula
  K[(Al,FeIII),(FeII,Mg)](AlSi3,Si4)O10(OH)2
• Properties

  Green earth is a natural pigment that varies from yellow and olive to blue-green in its composition and hues. It is semi-transparent, has low hiding power and tinting strength, muddies and darkens in oil, and is particularly good for tempera and fresco painting.

• Permanence

  Green Earth has excellent permanence and lightfastness, although some varieties can be developed by light calcining. It is one of the most permanent pigments because Earths are not affected by sunlight or atmospheric conditions.

• Toxicity

  Green Earth has no significant hazards.

• History

  Terre verte is French for green earth. It was discovered in antiquity, and its use has been traced to the Ajanta caves in India and a variety of Roman sites, including Pompeii. Green Earth was very popular for underpainting flesh tones in medieval paintings because this green was the compliment to pink on the medieval color wheel. Its use declined after the Renaissance. The natural supplies of the pigment are mostly depleted, and manufacturers currently duplicate the hue using mineral bases like Viridian, iron oxide, or chromium oxide, or artificial ceramic colorants. Pigments sold under this name can also be the result of mixing Sienna and Phthalo Green.

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