Arts & Culture
Key Differences Between Tempera and Oil Painting Techniques
Quick fact
Egg tempera dries in seconds, forcing artists to build color with tiny, hatched strokes, whereas oil paint can stay workable for days, allowing soft blends and transparent glazes.
Why this is interesting
You've seen the luminous glow of a Renaissance altarpiece and the deep shadows of a Baroque portrait. Why did artists switch from tempera to oil—and what did they gain or lose?
Read the full explanation
Understanding Key Differences Between Tempera and Oil Painting Techniques
Think of tempera as the 'instant coffee' of painting—once mixed with egg yolk, it dries almost immediately, so you can't blend colors on the canvas. Artists had to apply many thin, opaque layers in crosshatched strokes to create shading. The result is a bright, matte surface with crisp details, as seen in medieval icons. Oil paint, on the other hand, is like 'thick honey' mixed with linseed oil. It stays wet for a long time, allowing painters to mix, blend, and smooth edges. The slow drying also enables transparent glazes—layers of thin color that build depth and luminosity, like the rich shadows in a Rembrandt portrait. The binder—egg yolk for tempera, oil for oil paint—is the core difference.
A deeper explanation
The key lies in the chemistry of the binder. Tempera uses an emulsion of egg yolk and water. As water evaporates, the yolk proteins crosslink and harden rapidly, creating a tough, water-resistant film. This quick drying limits working time and prevents wet-on-wet blending. Painters must use hatching (fine parallel lines) or stippling to model form. The result is a flat, matte finish with high luminosity because light scatters off the many microscopic pigment particles. Oil paint uses vegetable oils like linseed or walnut. These oils 'dry' via oxidation—they absorb oxygen from the air and polymerize into a flexible, amber-colored film over days or weeks. This slow, even drying allows artists to work wet-into-wet, blending edges seamlessly. It also supports glazing: applying a translucent layer over a dry opaque layer, so light passes through and reflects back, creating deep, glowing colors. The flexibility of oil also enabled the development of chiaroscuro (strong contrast of light and shadow) and sfumato (smoky blending), which tempera could not achieve. Historically, European artists from the 15th century gradually abandoned tempera for oil—first in Northern Europe (Van Eyck) and later in Italy—because oil allowed greater realism, richer color, and larger canvases that didn't crack. Yet tempera's precision and permanence kept it alive for icons and early Renaissance works.