Color Swatch created using heavy to light application and was applied on 100 lb (163 gsm) drawing paper material.
This color contains the following pigments:
PY42—Mars Orange
Pigment Type
inorganic, earth
Chemical Name
iron oxide
Chemical Formula
Fe2O2 or Fe2O3 • H2O
Properties
Mars Orange is a bright, extremely light red and appears almost pinkish in contrast with darker colors. It has incredible tinting strength and opacity. The synthetic form of Mars Orange is made from iron oxides and is cleaner, brighter, and denser than its ochre-based counterparts.
Permanence
Mars Orange has excellent permanence and lightfastness.
Toxicity
Mars Orange has no significant hazards.
History
The word Mars refers to the Roman god of iron and war. Mars Orange has been manufactured as a pigment since the 17th century.
Alternate Names
n/a
PG17—Chromium Oxide Green
Pigment Type
inorganic
Chemical Name
chromium oxide
Chemical Formula
Cr2O3
Properties
Chromium Oxide Green is a dull, dense, willow or pale green color that is completely opaque. It has an average drying time and a low tinting strength. It is fairly flexible in oil form and is suitable for all purposes and mediums. This pigment is less versatile in mixtures than Viridian and Phthalocyanine Green, but mixes well with other colors without overpowering them.
Permanence
Chromium Oxide Green has excellent permanence, even at high temperatures.
Toxicity
Chromium Oxide Green is slightly toxic. Evidence of Chromium(III) carcinogenicity is inconclusive. Chromium(III) salts appear in greenish pigments such as PG17. Chromium(VI) salts, which appear in yellowish pigments, have been proven to cause cancer.
History
Louis-Nicolas Vauquelin discovered the element chromium in lead chromate in 1797. It began to be used as an enamel and ceramic color in 1809, but it had limited use as a pigment until 1862, because of its cost. It is the most commonly used green for military camouflage because it appears the same shade as living foliage under infrared light.
Alternate Names
Chrome Oxide Green, Olive Green, Permanent Green. Varieties of Chromium Oxide Green include Arnaudon's Green, Dingler's Green, Plessy's Green, and Schnitzer's Green.
PY53—Nickel Titanium Yellow
Pigment Type
inorganic
Chemical Name
mixed metal oxide
Chemical Formula
(Ti,Ni,Sb)O2
Properties
Nickel Titanium Yellow is one of the cleanest and brightest of the inorganic pigments. It has a low tinting strength and average to slow drying time.
Permanence
Nickel Titanium Yellow has excellent lightfastness and outstanding stability with regard to chemicals, weather, and heat. It is durable in exterior conditions.
Toxicity
Nickel Titanium Yellow is not considered toxic.
History
Nickel Titanium Yellow was developed in the 1960s.
Alternate Names
Nickel Titanate Yellow, Nickel Yellow.
PBr24—Chrome Antimony Titanate
Pigment Type
inorganic
Chemical Name
chrome antimony titanate
Chemical Formula
n/a
Properties
Chrome Antimony Titanate is a staining, opaque yellowish brown pigment. It is often used to replace the original Naples Yellow or Chrome Yellow, both of which are highly toxic pigments.
Permanence
Chrome Antimony Titanate has excellent lightfastness and weatherfastness.
Toxicity
Chrome Antimony Titanate has negligible acute toxicity. In testing with rabbits, it was shown to be minimally irritating to the skin and eyes. Since it has the hexavalent structure of a chromium yellow, whether Chrome Antimony Titanate is a potential carcinogen has been a subject of controversy. At this time, regulations in the USA do not require it to be labeled in any way.
History
Chrome Antimony Titanate is used in ceramics, plastics, and industrial coatings.
Alternate Names
Chrome Antimony Titanium Buff Rutile, Chrome Titanate, Chrome Titanate Brown
