Watercolor neapolitan yellow light 3.2 ml

PIGMENT FEATURE - high porosity

Neapolitan yellow got its name from the original place of extraction - the Naples region, where it was extracted from some areas of solidified lava. Artificial production began in Italy around the middle of the 18th century. The pigment has been known for over 2.5 thousand years. The name "Neapolitan yellow" arose after 1700. Italian artists used it since the 14th century. In Russia and France since the 17th century.

Composition of lead antimony Pb2Sb207 (Sb2Cbx2PbO). Depending on the quantitative ratios of the components, the pigment has various shades from light yellow with a golden hue to yellow-orange, and is distinguished by some fading. In painting, Neapolitan yellow paints often imitate the color of gold.

Neapolitan yellow is a quick-drying paint and accelerates the drying of other paints. It has high covering power. It does not allow contact with iron; the paint darkens, so you should not apply the paint with a palette knife. The paint is lightfast, but darkens with prolonged exposure to light. Naples yellow darkens under the influence of hydrogen sulfide and sulfur gases.

Neapolitan yellow had a similar name. According to its composition, it is antimony-lead salts of varying proportions with a variable amount of lead oxide. It was discovered around the middle of the 18th century in Naples and was sometimes used in Italy under the name "giallolino". It often contained impurities (aluminum oxides - alumina and potassium). Sometimes, under the name antimony yellow, paint with the addition of bismuth oxide or its antimony salt was used.

•Chemical description: watercolor paint, semi-dry, in a 3.2 ml cuvette

•Chemical formula: Pb2Sb2O7 ZnO

•ColorIndex PY 41

•Opaque

•Lightfastness – 8

•Alkali resistance: 5

•Lime resistance: 5

•Acid resistance: 5

•Color yellow

•Cuvette shape 3.2 ml.

•High hiding power

Undesirable mixtures of paints based on lead pigments.

• Mixtures of lead pigments with ultramarine, cobalt blue and violet, madder lake (anthraquinone) are unacceptable. Mixing with these paints causes their darkening or browning of the tone.

• Lead pigments should not be mixed with paints prepared on organic pigments.

• In mixtures of lead pigments with dark cobalt violet, natural dark umber