PrimaTone Raw Sienna
Fast-Drying Oil-Alkyd Paint for Professional Results
PrimaTone Raw Sienna is a transparent, warm brown earth color formulated with natural hydrated iron oxide (PY43) sourced from ocher deposits in the United States. Known for its golden-brown hue and luminous warmth, Raw Sienna has long been a fundamental color on the painter’s palette. Ground in a durable oil-modified alkyd binder, this paint dries evenly to a matte or semi-gloss finish within 18 to 24 hours—ideal for artists seeking rapid drying without compromising on control or tradition.
Its transparency and moderate tinting strength allow for layered effects and nuanced modulation in tonal painting. Whether used in glazes, washes, or underpainting, PrimaTone Raw Sienna brings balance, naturalism, and depth to a wide range of subjects—from portraiture and figure studies to landscape and atmospheric work.
PrimaTone—Fast-Drying Oil-Alkyd PaintsPrimaTone paints deliver the trusted characteristics of traditional oils with the added benefit of accelerated drying. Colors are touch-dry in 18–24 hours and ready for varnishing in approximately 30 days. With a working time of 4 to 8 hours, artists can refine and blend with ease before the paint sets.
All PrimaTone colors dry uniformly to a matte to semi-gloss surface, making them ideal for both foundational layers and final applications. The combination of lightfast pigments and a resilient alkyd binder ensures a long-lasting paint film. Compatible with traditional oil mediums and easily cleaned with mineral spirits, PrimaTone offers a practical solution for artists seeking speed without compromise.
Key Features-
Pigment: Raw Sienna (PY43)
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Chemical Composition: Natural hydrated iron oxide (Fe₂O₃·nH₂O)
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Color Index Name: Pigment Yellow 43 (77492)
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Opacity: Transparent to semi-transparent
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Tinting Strength: Moderate
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Drying Time: Touch-dry to hard-dry within 24 hours (ASTM D5895 Stage III)
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Working Time: Approximately 8 hours
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Finish: Matte to semi-gloss
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Lightfastness: ASTM I (Excellent)
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Binder: Oil-modified alkyd
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Compatibility: Traditional oil paints, mediums, and solvents
PrimaTone Raw Sienna is finely milled for a smooth, fluid consistency that facilitates washes and transparent layering. Its earthy golden hue and excellent transparency make it a favorite for:
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Glazing and optical blending
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Underpainting and monochromatic studies
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Skin tone modulation and shadow warmth
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Landscape painting and natural light effects
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Tonal sketches and classical technique layering
The formulation supports both precise detail and expressive brushwork, adapting well to both studio and plein air practices.
Ingredient TransparencyPrimaTone upholds complete ingredient transparency. This color contains:
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Raw Sienna (PY43)
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Oil-modified alkyd binder
- High-flash hydrotreated petroleum distillate
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Dispersing agent
No fillers, extenders, or undisclosed additives are included.
Safety and ToxicologyPrimaTone Raw Sienna contains Pigment Yellow 43, a naturally occurring hydrated iron oxide with a long history of safe use in artist materials. It is non-toxic and presents no chronic health risks under typical studio conditions. No special hazard labeling is required under ASTM D4236.
The oil-modified alkyd binder includes a small amount of hydrotreated petroleum distillate, a high-flash, low-odor aliphatic hydrocarbon used to improve handling and viscosity. At the concentration used, it does not trigger chronic hazard labeling for art materials intended for adult use.
As with any oil-based paint, standard studio practices apply: avoid ingestion, do not sand dried paint films, ventilate workspaces appropriately, and use gloves if skin sensitivity is a concern.
All pigment, binder, and additive ingredients are clearly listed on the product label, in keeping with Natural Pigments’ commitment to complete transparency. Store in a cool, dry place and keep out of reach of children.
Composition and Permanence| Raw Sienna | |
| Color: | Brown |
| Binder: | Oil-Modified Alkyd |
| Additive(s): | Dispersing Agent |
| Pigment Information | |
| Pigment: | |
| Pigment Classification: | Natural inorganic |
| Colour Index: | Pigment Yellow 43 |
| Chemical Name: | Iron oxide |
| Chemical Formula: | Fe2O3 |
| CAS No. | |
| Properties | |
| Code: | 601 |
| Series: | 1 |
| Opacity: | Semi-Transparent |
| Tinting Strength: | Moderate |
| Working Time: | 6–8 hours |
| Drying Time: | 18–24 hours |
| ASTM Lightfastness: | I |
| Permanence: | A |
For a detailed explanation of the terms in the table above, please visit the page.
All color swatches on this website are approximations of the actual color of the oil paint. We have taken every care to match the color in these pictures on calibrated color monitors to the actual color. However, due to the wide variance in color monitors, the results you obtain may vary.
Drawdown Note: The image of the “drawdown” shows a premixed paint film 6 mils (0.006 inches) thick applied to a standard test card to examine color consistency, opacity, and other qualities. The drawdowns show the color at full strength (mass tone) on the left and mixed with titanium white at a 1:2 ratio on the right.