ONE THAT COMES IN A PACKAGING THAT IS INNOVATIVE, ELEGANT, HANDY AND FEELS RIGHT.
This combination of PB29-Ultramarine [Blue]; PY74-Hansa Yellow; PBk7-Lamp Black creates a warm lightfast clean earth tone opaque green. The lightfast, rich mid-range green with a yellow undertone. Originally Sap Green was a lake pigment made from unripe buckthorn berries.andnbsp;This hue is a perfect replacement for the original unripe buckthorn berry lake.
Sap Green is generally named for a warm, deep green. Sap green is a lake pigment initially made from the juice of unripe berries from the buckthorn (Rhamnus) plant. In medieval times the extracted colour was reduced to a heavy syrup and sold in pig bladders rather than a dry pigment. Excellent reds and sap green are complementary colours; mixed, they neutralize each other. The skin has a greenish undertone. Consequently, skin shadows are always will have a greenish undertone.
Composition and Permanence:
Pigment Combination: PB29-Ultramarine [Blue]; PY74-Hansa Yellow; PBk7-Lamp Black
1 PIGMENT NAME: PB29-ULTRAMARINE [BLUE]
Pigment Type: Inorganic
Chemical Name: Complex silicate of sodium and aluminum with sulphur
Properties
Ultramarine is the standard warm blue, a brilliant blue pigment with the most purple and least green in its undertone. It has a moderate to high tinting strength and beautiful transparency. Synthetic Ultramarine is not as vivid a blue as natural Ultramarine. Ultramarine dries slowly in oil and produces clean, though granular, washes in watercolour. French Ultramarine mixes well with Alizarin colours in oil and watercolour form to create a range of purples and violets. It can dull when mixed with white in acrylic form but mixes well with other colours. The shade varies based on the manufacturer. Considered a great colour 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 discolour 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 colours on their palettes.
2 Pigment Name: PY74-Hansa Yellow
Pigment Type: Monoazo
Properties
Pigment PY74 is one of the most commercially essential pigments of the Hansa Yellow group, considered superior to many others in its class based on both tinting strength and lightfastness. Several PY74 grades with different particle sizes are available. Grades with finer particle sizes are more brilliant and transparent. Pigment PY74 ranges from reddish yellow to greenish-yellow, shifting temperature from cool to warm hues. It has high tinting strength and average to slow drying time.
Permanence
This Hansa Yellow has better lightfastness than other yellow monoazo pigments, notably darker shades.
Toxicity
Hansa Yellow has no significant acute hazards, though its chronic hazards have not been well studied.
History
Hansa Yellows were first made in Germany just before WW1 from a series of synthetic dyestuffs called Pigment Yellow. They were intended to be a synthetic replacement for Cadmium Yellow.
3 Pigment Name: PBk7-Lamp Black
Pigment Type: Inorganic
Chemical Name: Carbon
Properties
Lampblack is a very opaque, heavily staining black pigment that does not have much covering or tinting power. It is typically the opaquest black in watercolour form. Though a very pure black, it tends to muddy slightly in mixtures. Natural sources may be brownish or bluish in tone because of impurities. When used in oil paints, it is one of the slowest drying pigments and should not be used in underpainting or applied in layers underneath other colours.
Permanence
Lamp Black is very lightfast and permanent. It is used in all techniques in permanent painting.
Toxicity
Carbon itself is not considered hazardous; however, other dangerous combustion products are often present as impurities when Lamp Black is produced from natural materials. For this reason, commercial preparations of the pigment should be considered.
History
Lamp Black is a carbon-based black traditionally produced by collecting soot (known as lampblack) from oil lamps. It has been used as a pigment since prehistoric times. It is the black found in Egyptian murals and tomb decorations and was the most popular black for fresco painting until the development of Mars Black.
