Color Swatch created using heavy application/medium application/50% tint and was applied on acrylic primed canvas (7 oz) material.
This color contains the following pigments:
PY74LF—Hansa Yellow
Pigment Type
organic, monoazo
Chemical Name
n/a
Chemical Formula
C18H18N4O6
Properties
This Hansa Yellow ranges from reddish yellow to greenish yellow with temperature shifts from cool to warm hues. It has good tinting strength and average to slow drying time.
Permanence
Hansa Yellow PY74 has excellent lightfastness, particularly in the darker shades. Pigment PY74LF is a proprietary preparation of PY74 for which the manufacturer claims better lightfastness.
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.
Alternate Names
Hansa Yellow pigments are marketed under many names, including Arylide Yellow, Brilliant Yellow, Monoazo Yellow, and Permanent Yellow.
PBr7—Burnt Sienna
Pigment Type
earth
Chemical Name
iron oxides
Chemical Formula
Fe2O3
Properties
Burnt Sienna is a warm, mid-brown color formed by burning the yellow-brown limonite clay called Raw Sienna. It ranges from semi-opaque to semi-transparent due to the combination of its opaque, red-brown mass tone and its transparent, orangey undertone. It is an excellent mixing complement for blues and greens and creates salmon or peach colored tints when mixed with white. It can be useful for subduing bright colors and does not get chalky in dark mixtures.
Permanence
Burnt Sienna has good permanence and is considered one of the most versatile of the permanent pigments.
Toxicity
Burnt Sienna has no significant hazards.
History
Burnt Sienna has been used as a pigment since prehistoric times, but its current name came about during the Renaissance. It comes from the city of Siena, in Italy, and is short for terra di Siena, meaning earth of Siena. Sienna was famous for the mining and production of earth pigments from the Renaissance until World War II. Due to the depletion of clay deposits in Tuscany, Italian siennas now come from other areas, including Sicily and Sardinia.
Alternate Names
Caput Mortuum, Italian Earth, Natural Brown Iron Oxide, Sienna, Spanish Red, Vandyke Brown.
PO5—Dinitraniline Orange
Pigment Type
monoazo
Chemical Name
n/a
Chemical Formula
C16H10N4O5
Properties
Dinitraniline Orange is a clean, bright, reddish orange. It is generally low cost and has an average drying time.
Permanence
Dinitraniline Orange has full to medium tone lightfastness.
Toxicity
Dinitraniline Orange is not considered toxic.
History
Unknown.
Alternate Names
Permanent Orange.
