Stil de grain yellow

Traditional sap green is made from both ripe and unripe buckthorn berries, and prepared in different ways. Berry harvest time, varietal, preparation method and time period of use have a lot to do with the common name used to refer to that particular hue, color, recipe or chemical composition. Extracting the coloring principle through boiling water, allows one to add different mordants, such as alum or soda, each resulting in a different hue of this color.

Unripe berries (Italian: rhamni immaturi) produces a dark brown pigment in its dense form, and turns to a bright yellow in a thin layer. It has a low lightfastness rating of about 4.[5] Ripe berries (Italian: rhamni maturi) produce a color called yellow madder, stil de grain, or yellow lake. It is not permanent and was often used for decorative painting.[6]

Most often when called sap green the color is in the form of a dyestuff, either direct from berry juice or as a lake precipitated with alum.[3] In lake form, this color is considered to fade rapidly.[7]

For use in medieval illuminated manuscripts, the color was sold in dried sheep bladders in a liquid form that resembled a dense syrup, instead of being dried and sold as powder.[8]

The first recorded use of pinke as a color name in English for this yellow pigment was in 1598.[9] The names stil de grain yellow and yellow madder came into use as the name for this yellow pigment in the early to mid-18th century, replacing the former name pinke.[10]

In the 17th century, the word pink or pinke was used to describe a yellowish pigment, which was mixed with blue colors to yield greenish colors. Thomas Jenner's A Book of Drawing, Limning, Washing (1652) categorizes "Pink & blew bice" amongst the greens (p. 38),[11] and specifies several admixtures of greenish colors made with pink—e.g. "Grasse-green is made of Pink and Bice, it is shadowed with Indigo and Pink ... French-green of Pink and Indico [shadowed with] Indico" (pp. 38–40). In William Salmon's Polygraphice (1673), "Pink yellow" is mentioned amongst the chief yellow pigments (p. 96), and the reader is instructed to mix it with either Saffron or Ceruse for "sad" or "light" shades thereof, respectively (p. 98).

It was enjoyed widely in the 18th century in France and England.[8]

Although it is used widely by name, it is rare to find a pre-made fine artist product that contains this pure pigment. Berries, ripe or unripe, as well as different versions of the lake are obtainable in powdered pigment form, although it is costly[5] compared to its substitutes. It is fugitive and therefore not ideally suited for oil color, but has survived well in manuscript form due to the natural protections from light and moisture that a book offers.

In contemporary art supplies the term sap green often indicates a mixture intending to resemble the traditional Sap Green or Stil de grain yellow. Contemporary oil colors often use coal tar lakes as a substitute.[3] In 2006 Golden Artist Colors' line of "historical colors" acrylic paint included one named "sap green", made of synthetic iron oxide, nickel complex azo, brominated and chlorinated copper phthalocyanine and nearly pure amorphous carbon.[12]

The source of this color is: ISCC-NBS Dictionary of Color Names (1955)--Color Sample of Stil de Grain Yellow (color sample #83).

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