Why did Hieronymus Bosch apply exceptionally thin glazes of oil paint?
Chapter 1

The mysterious man of Den Bosch

Chapter 2

Decoding the dreams

Chapter 3

Secrets of the brush

Chapter 4

The ripple effect

YOUR GOAL

Master of The wild world of Hieronymus Bosch

Ch 3 · Secrets of the brush
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andy Secrets of the Brush

Look beneath, look beneath! A secret sketch is waiting underneath.

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Even the wildest imagination is shaped by what we choose to discard.

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The limited Renaissance palette

andy Four simple medieval pigments—azurite, malachite, vermilion, and toxic lead-tin yellow—fueled the vivid colors and glowing fires of Bosch's

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Revealing the hidden underdrawings

andy Charcoal sketches of deleted monsters appear beneath the cracked layers of oil paint.

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Fun Fact

Hidden sketches: Infrared scans of 'The Garden of Earthly Delights' show that Bosch originally sketched a giant dragon that he later painted over.

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Glossary
underdrawing (noun)
A preliminary drawing made on a surface before paint is applied over it. Bosch sketched these preliminary underdrawings on oak panels using a coarse brush and thin paint.

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Gossip

Do you sketch before painting?

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Quiz

What does the painting technique 'alla prima' refer to in Hieronymus Bosch's work?

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Quiz

What material did Hieronymus Bosch use to draw his initial sketches on the wood?

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Quiz

Why did Hieronymus Bosch apply exceptionally thin glazes of oil paint?

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Quiz

What mineral was the source of the deep blue pigment azurite used by Bosch?

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Quiz

What do the underdrawings of Hieronymus Bosch's paintings reveal about his creative process?

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Quiz

What type of wood did Hieronymus Bosch use for his painting panels?

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Quiz

Which toxic ingredient did Hieronymus Bosch use to paint his bright yellow fires?

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Quiz

Which scientific method reveals Hieronymus Bosch's hidden sketches beneath his paint layers?

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