Transparent Red Oxide
 
Joules & Joules Transparent Red Oxide Matte Acrylic Paint is a deep, luminous earthy red distinguished by its pronounced transparency, excellent lightfastness, and moderate tinting strength. In thin layers, it reveals subtle pinkish and orange undertones, producing a warm, vibrant earthiness that is difficult to achieve with other red pigments. This behavior results from the use of synthetic anhydrous iron oxide (PR101), milled into ultra-fine particles that give the paint a glass-like transparency and precise chromatic control—ideal for glazing, shadow building, and subtle tonal transitions in figurative and landscape painting.
 
Red iron oxide is among the oldest and most durable pigments in human history, found in cave paintings and artifacts dating back more than 40,000 years. Its synthetic version, developed in the 19th century, offered superior purity, tonal consistency, and unmatched stability. The transparent form, achieved through controlled ultra-fine grinding, represents the pinnacle of this technical evolution—preserving the mineral, ancestral character of the pigment while enhancing optical refinement and chromatic vibrancy. Transparent Red Oxide is therefore a contemporary reinterpretation of a universal classic.
 
In performance, this paint stands out for its lightfastness rating of I (Excellent) and outstanding permanence across all media. Its fast drying time and uniform adhesion make it highly versatile for layering and depth effects, while maintaining a consistent matte surface. Joules & Joules Transparent Red Oxide unites tradition, stability, and technical refinement, making it indispensable in palettes that seek warmth, subtlety, and mineral transparency in their compositions.
 
Pigment Classification
Synthetic Inorganic Pigment
 
Chemical Composition
Synthetic Anhydrous Red Iron Oxide
 
Color Index
PR 101
 
Binder
Acrylic Resin
 
Transparency/Opacity
Transparent
 
Lightfastness
I (Excellent)
 
Tinting Strength
Medium
 
Drying Time
Fast
 
Notes
Excellent permanence in all media.
 
Toxicity
Not considered toxic; however, ingestion, contact with eyes, and prolonged skin contact should be avoided.
 
MSDS (Safety Data Sheet)
Available on the website here.
 
Series
2
 
Availability
37 ml and 100 ml tubes, and 250 ml jars.