R&F Pigment Stick - Sienna Yellow Extra Pale, 38 ml
This colour has a similar value to Brilliant Yellow Extra Pale, but next to Brilliant Yellow, it appears neutral, while next to Neutral White, it appears brilliant. This colour is made with translucent yellow iron oxide and white.
- Pigment Composition: PR206-Quinacridone Pyrrolidine Red; PW6-Titanium White; PW7-Zinc Sulphide White
- Dimension: 38 ml. stick measuring 5" x 3/4" diameter
- Paint Lines: Encaustic, Pigment Stick
- Opacity: Opaque
- Pigment Stick Drying Rate: Medium
- Classification: Synthetic Inorganic
- Chemical Composition: Iron oxide + titanium-zinc white
- Safety Information: Conforms to ASTM D-4236
Pigment Name: PR206 Quinacridone Pyrrolidine Red
Classification: organic, quinacridone
Chemical Composition: Quinacridone pyrrolidine
Properties
PR206 offers a deep maroon or Bordeaux red. Quinacridone pigments generally have relatively low tinting strength. For this reason, quinacridone colours are often expensive because more pigment is required in the formulation.
Permanence
Quinacridone pigments have excellent lightfastness.
Toxicity
Quinacridone Pyrrolidine Red has no known acute hazards. Overexposure to quinacridone pigments may cause skin irritation. Quinacridone pigments contain a compound found to be a skin, eye, and respiratory irritant.
History
It was developed as a maroon or Bordeaux red for automotive paints.
Pigment Name: PW6 Titanium White
Classification: Inorganic
Chemical Composition: Titanium dioxide
Properties
Titanium White is the most brilliant of the white pigments. It is considered an all-purpose oil colour that is useful in all techniques and the best all-around white. Its masstone is neither warm nor cool, placing it between Lead White and Zinc White. It is less prone to cracking and yellowing than Lead White, but it still yellows easily. Titanium White dries slowly in oil form, more slowly than Lead White but more quickly than Zinc White. It is opaque in oil and acrylic forms and semi-opaque in watercolour form. This pigment has good chemical stability, and its tinting strength is superior to both Lead White and Zinc White.
Permanence
Titanium White has excellent permanence and lightfastness.
Toxicity
Titanium dioxide is highly stable and is regarded as completely non-toxic. Animal studies do not indicate that it is absorbed biologically, even after long periods of exposure. The primary safety concern is with the inhalation of fine pigment dust particles.
History
Titanium is the ninth most abundant element in the Earth's crust. However, mineral deposits that are economical to mine are rare. Titanium dioxide was first discovered in 1821, although it could not be mass-produced until 1919. Widespread use of the pigment began in the 1940s. Since that time, it has become the most commonly used white pigment. The name comes from the Latin word Titan, the name for the elder brother of Kronos and ancestor of the Titans, and the Greek word tito, meaning day or sun.
Pigment Name: PW7 Zinc Sulphide White
Classification: Inorganic
Chemical Composition: Zinc sulphide
Properties
Zinc Sulphide White is a semi-transparent yellowish-white pigment. Zinc sulphide and zinc oxide (PW4) are often combined to create a more natural white colour. Transparency increases as particle size decreases. When slight impurities are added, zinc sulphide has phosphorescent and electroluminescent properties. It is often used to manufacture fluorescent or glow-in-the-dark paints.
Permanence
Zinc Sulphide White has excellent permanence and lightfastness.
Toxicity
Zinc Sulphide is non-toxic, but ore deposits often contain lead. Traces of lead and other impurities may be present in pigment powders. Ingestion is not recommended.
History
Zinc sulphide, when combined with slight impurities, has phosphorescent properties. It is often used to manufacture invisible ink that glows with ultraviolet light and fluorescent paints.
