plate no. 5442

Detail of St. Catherine from Virgin and Child with Saints, the Altarpiece of San Barnabas

panel, temperaEarly Renaissancereligious paintingportraitfigurereligioussaintheadscarf

what to study here

A single profile head shows clearly how value separation, soft edges and restrained shadow modeling make a face read as the focal point.

This detail isolates a woman's head in right profile against a dark, recessed ground, so the lesson is value hierarchy. The face is the brightest area, pale yellows and creams, and the background drops to near-black and dark green. Squint and the face reads as one bright shape. Study how the shadow side of the head and neck stays warm and pale instead of turning muddy. The edges on the face are so softly blended they look feathered, and the profile line is defined but never hard. Notice how handling changes outward from the face: strokes in the hair and headdress become more visible, with fine linear marks for curls and for the white decoration on the headscarf. The background is looser and more atmospheric than the face. The hair sits in a middle value between face and ground, with lighter golden-browns and deeper shadow tones. Copy it in order: profile, value masses, skin tone, restrained shadows, small highlights on forehead, nose and cheekbone, then hair and headdress.

key decision

The painter made the face the brightest value and set it against a near-black recessed background. Brushwork is nearly invisible on the face and becomes more visible toward the hair and headdress.

recreation guide

This recreation focuses on the tempera panel technique characteristic of Sandro Botticelli’s Early Renaissance period. The artwork, a detail from the Altarpiece of San Barnabas, relies on the fast-drying, water-soluble binder medium known as egg tempera, which consists of pigments mixed with glutinous material such as egg yolk (Source 5). Unlike oil painting, which allows for blending and illusionistic depth, tempera demands a methodical application of distinct, linear strokes to build up color and form. The artist’s practice during this era prioritized the 'vitality possessed by the medium' over deceptive naturalism, treating the painted surface as a collection of symbols rather than a window into reality (Source 6). The palette would have been grounded in substantial, fixed earths, ochres, and marls, which offer covering power and ease of drying, alongside traditional pigments like chalk white, red ochre, and black (Source 1).

estimated time

40-60 hours over 8-12 sessions

materials

8 items

steps

5 in sequence

materials

item	purpose	modern equivalent
Egg yolk	Primary binder for the tempera medium	—
Gesso ground (chalk/gypsum and animal glue)	Preparation of the wooden panel surface	Acrylic gesso (though traditional rabbit-skin glue and chalk is historically accurate)
Natural and burnt ochres	Earth tones for modeling and broken tones	Yellow Ochre, Burnt Sienna
Chalk white / White lead	Highlights and mixing base	Titanium White (for safety) or Flake White (for historical accuracy)
Red ochre / Cinnabar (Vermilion)	Flesh tones and red garments	Red Ochre, Cadmium Red or Vermilion
Indigo / Blue enamels	Blue garments and shadows	Ultramarine or Indigo pigment
Various blacks (ivory black, grapestone black)	Outlines and deep shadows	Ivory Black or Mars Black
Sable or squirrel hair brushes	Fine linear application of tempera	Fine liner brushes

preparation

surface prep

The panel must be prepared with a smooth, white gesso ground. While specific preparation details for this exact panel are not in the sources, Early Renaissance tempera requires a rigid, absorbent surface. The artist must ensure the ground is perfectly smooth to allow for the fine linear work characteristic of the period. The material choice is critical; as noted, the artist must find out the particular qualities of the medium and not attempt more than it is capable of doing (Source 6).

underdrawing

Botticelli’s drawings are well-documented (Source 8), suggesting a strong reliance on preparatory sketches. For tempera, a carbon transfer or a light underdrawing in charcoal or black chalk is likely used to establish the linear composition. The underdrawing should be precise, as tempera does not allow for the 'departure from outline' that oil painting might permit (Source 2).

underpainting

In tempera, there is no true 'underpainting' in the oil sense (like grisaille). Instead, the artist likely begins with the darkest tones or a mid-tone ground, building up light through glazing and scumbling. However, given the 'fast-drying' nature of the medium, the process is additive from dark to light or light to dark depending on the specific pigment opacity. Sources do not specify a distinct underpainting layer for this work, so the artist should proceed directly to color application in thin layers (Source 5).

color palette

White

Chalk white or White lead

Highlights and mixing base; ancient artists used chalk white (Source 1)

Yellow/Earth

Natural and burnt ochres

Broken tones, skin modeling, and earthy backgrounds; valued for fixedness and covering well (Source 1)

Red

Red ochre, Cinnabar (Vermilion), or Red lac

Garments and flesh tones; Pliny notes the enrichment of painting with new colorants like red lac and cinnabar (Source 1)

Blue

Indigo or Blue pulverised enamels

Virgin’s robes or saintly garments; listed as available coloring substances (Source 1)

Black

Ivory black or grapestone black

Outlines and deep shadows; prepared from combustion of different bodies (Source 1)

composition

The composition likely adheres to the rectangular format, where vertical and horizontal lines set up a relationship with the boundaries of the picture (Source 7). The artist should be mindful of the 'arresting power of the right angle' at the corners, potentially using dark masses or swinging lines to direct the eye to the center (Source 7). While specific details of St. Catherine’s pose are not described in the sources, the general principle of arranging abstract lines to create rhythmic force applies (Source 7). The work is part of a larger altarpiece, which may have included donor portraits or other saints, reflecting the religious devotion of the period (Source 4).

step by step

underdrawing→first pass→refining→finishing

underdrawing

step 01
Transfer the design onto the gessoed panel using charcoal or black chalk. Ensure lines are precise, as tempera requires a firm outline.
Tip — Do not over-model at this stage; keep it structural.
Linear drawing

first pass

step 02
Mix pigments with egg yolk and a small amount of water. Apply the first layer of color in thin, transparent washes or opaque strokes, depending on the pigment.
Tip — Tempera is fast-drying; work in small areas to avoid hard edges between strokes (Source 5).
Egg tempera application

refining

step 03
Build up the forms using short, linear strokes (hatching). Do not blend wet-on-wet. Use ochres and earths for broken tones, as they cover well and dry easily (Source 1).
Tip — Avoid the 'luxury of personages' or material appreciation over soul; focus on the emotional idea (Source 1).
Hatching/Stippling
step 04
Add highlights with chalk white or mixed lighter tones. Use the 'vitality possessed by the medium' to express feeling, not just visual deception (Source 6).
Tip — Remember that art is an expression of feeling, not a substitute for nature (Source 6).
Highlighting

finishing

step 05
Review the composition for rhythmic force. Ensure that lines direct the spectator's attention to the principal subject, avoiding distraction by the corners (Source 7).
Tip — Check if the 'right angle' at the corners is too arresting; soften with dark masses if necessary (Source 7).
Compositional balance

critical techniques

Egg Tempera Mixing

Pigments are mixed with egg yolk, a water-soluble binder. This creates a permanent, fast-drying medium (Source 5).

Linear Stroke Application

The artist must respect the limitations of the medium, not attempting illusionistic effects that oil paint might allow (Source 6).

Use of Earth Pigments

Ochres and marls are used for broken tones and their fixedness. They are preferred for their covering power and ease of drying (Source 1).

common pitfalls

→Attempting to blend colors wet-on-wet, which is impossible with fast-drying egg tempera (Source 5).
→Over-modeling or becoming 'too much tied down to your outline' without achieving the necessary finish (Source 2).
→Ignoring the 'vitality of the medium' in favor of deceptive naturalism, which results in a 'meretricious attempt to deceive the eye' (Source 6).
→Using unstable pigments that may change chemically; stick to substantial, fixed earths and traditional pigments (Source 1).

what the sources don't tell us

Where the corpus is silent, we say so rather than guess. These are the gaps a complete recreation guide would normally cover that our source passages don't.

·Specific visual details of St. Catherine’s attire, facial expression, or gestures are not described in the provided sources.
·The exact dimensions of the panel are not available.
·The specific year of creation is not available, though it is attributed to the Early Renaissance period.
·Details about the workshop system’s involvement in this specific panel are not explicitly stated, though general Netherlandish practices suggest possible assistant involvement in prosaic passages (Source 4).

grounded in

The technical procedure in this guide traces to the following classical art-instruction texts.

The Science of Painting↗
- CHAPTER V. COLOURING SUBSTANCES — applied to Selection of pigments (ochres, chalk white, cinnabar) and their properties (fixedness, covering well).
The Practice of Oil Painting↗
- ON COPYING — applied to Advice on copying works to correct weaknesses in finish or outline adherence.
The Practice and Science of Drawing↗
- XX MATERIALS — applied to Philosophy of using the medium’s vitality rather than seeking deceptive naturalism.
- ILLUSTRATING SOME OF THE LINES... — applied to Compositional principles regarding rectangular formats and directing the eye.

cross-referenced from

Named facts about this artwork and artist were checked against these reference pages.

Wikipedia: Tempera↗
- Tempera — part 1 — applied to Definition and properties of egg tempera (fast-drying, egg yolk binder).
Wikipedia: Early Netherlandish painting↗
- Early Netherlandish painting — part 23 — applied to Context of religious devotion and workshop practices, though noting this is Netherlandish, it informs the general altarpiece context.
Wikipedia bio — Sandro Botticelli↗
- part 1 — applied to Confirmation of Botticelli’s panel painting practice and drawing habits.

Read more about the corpus on the sources page and how the guides are built on the methods page.

read from the painting

observed from the image, not the label

6 dominant colors, measured

what the eye sees

A woman's head in right profile dominates the composition, positioned against a darker recessed background of architectural elements and tapestry. Light falls gently from the front-left, illuminating the face with a pale, luminous quality while deeper warm shadows model the far side of the head and neck. The elaborate headdress—a pale headscarf with fine white linear decoration—frames the head and draws attention upward. The eye is pulled first to the face itself, particularly the refined profile and the glowing pale forehead, then follows the cascading waves of hair down the back of the head, and finally rests on the richly patterned garment below with its reds, blues, and woven textures.

value structure

The face is the brightest value area overall—pale yellows and creams that read almost luminous against the darker environment. The background drops into deep, cool-toned darks (near-blacks and dark greens), creating strong value separation. The hair occupies a distinct middle value range between face and background, with noticeable modulation from lighter golden-browns to deeper shadow tones. The headdress and garment occupy the mid-to-warm value range. When you squint, the face reads as one bright form set apart from everything else—this strong value contrast is fundamental to the portrait's hierarchy and legibility.

observed palette and mixes

#c0a773
titanium white + yellow ochre + touch of raw sienna
highest lights on forehead, nose tip, and cheekbone—the most luminous passages of skin
#a08b64
yellow ochre + raw sienna + titanium white
mid-tone skin areas on cheek, temple, and jaw—the core modeling of the face
#816f52
raw sienna + burnt sienna + yellow ochre
shadow side of face, neck, and the deeper skin transitions; also the mid-tones of the hair
#544939
burnt sienna + raw umber + touch of titanium white
the deepest hair shadows, particularly around the back and base of the curls
#73513a
raw umber + burnt sienna
accent shadows on the profile and definition lines, especially where the hair meets the face
#34352d
raw umber + ultramarine blue + touch of burnt sienna
the very dark background behind the head, the deep recession to read depth

edges and brushwork

The face is rendered with nearly invisible brushwork—edges are so softly blended they feel feathered, creating seamless transitions between light and shadow. The profile line itself is delicately defined but never hard; it breathes. As you move away from the face into the hair and headdress, individual strokes become subtly more visible, particularly the fine linear marks suggesting individual hair curls and the decorative patterns of the white scarf. The background is loosely handled compared to the face, with warmer, more atmospheric blocking that suggests rather than describes.

a working sequence

01
Establish the profile and head proportions
Lightly lay out the profile line of the face and the general head shape. Pay close attention to the refined proportions: the chin is delicate, the nose has a gentle slope, and the forehead is prominent. Block in the simple shape of the headdress as a mass above and around the head. Keep this stage purely structural—no values yet.
02
Block in the major value masses
Establish the darkest background around the head using deep browns and greens. This creates the envelope that will make the face glow. Block the face as a pale mass using a warm cream-yellow (mix yellow ochre heavily with white). Block the hair as a middle golden-brown. This stage is about creating strong value separation, not modeling.
03
Develop the face's foundational skin tone
Working across the entire face, establish the mid-tone skin layer using your warm tan mix (yellow ochre + raw sienna + white). Apply this evenly but with slightly more depth on the shadow side (right side of profile). The face should still feel flat at this stage—you're establishing the average tone before modeling.
04
Model the face with subtle shadow transitions
Using a warmer, darker mix (raw sienna + burnt sienna), carefully place shadows where the form recedes: along the far side of the nose, the shadow under the cheekbone, the temple area, and the underside of the chin. Apply these with extreme restraint—the shadows should be gentle suggestions of form, not dark patches. Blend thoroughly so no transitions read as hard edges.
05
Establish highlights and refine the face
Using your palest mix (white + yellow ochre), delicately place the highest lights on the forehead, the tip of the nose, and the prominent cheekbone. These should be small, strategic areas—not the entire face. The contrast between this pale highlight and the deeper shadow side creates the three-dimensional modeling. Refine the delicate line of the profile, keeping it soft.
06
Paint the hair with curl structure
Using your golden-brown and darker brown mixes, suggest the hair strands and curls, particularly at the back of the head where they cascade. Use fine, linear strokes following the direction of the curls. Vary the value subtly—not all hair is the same tone. Leave the palest areas of hair slightly lighter than the mid-tones to maintain luminosity.
07
Add the headdress and decorative details
Paint the pale headscarf using near-white with touches of pale cream-yellow. Add the delicate white linear patterns and borders with fine brushwork and a steady hand. Paint the colored underside of the headdress with soft greens, warm reds, and pale golds. Keep edges soft here—this area should support rather than compete with the face.
08
Develop the garment and final refinement
Block in the richly patterned garment below with its blues, reds, and oranges. Suggest the woven patterns without overworking them. Step back frequently to assess the overall value structure. Refine any edges that need sharpening, add final details to the headdress decoration, and ensure the face remains the dominant focal point with the strongest value contrast.

where studies of this painting go wrong

Over-darkening the face shadows—students often make shadows too brown or too strong, destroying the luminous quality. The shadow side should still read as warm and pale, not muddy.
Making the profile line too hard or rigid—it should be refined but feathered; any visible line-work in tempera will look crude compared to the soft modeling.
Losing sight of the pale headscarf's white patterns—these fine linear details require steady hands and restraint; over-rendering them becomes fussy, under-rendering makes the headdress read flat.
Neglecting the subtle value variation in the hair—treating all the hair as one uniform tone will flatten the form; the hair needs internal modeling to suggest its mass and curl structure.
Overworking the background—students often spend too much energy here, but it should remain atmospheric and subordinate; let it stay looser than the face.
Applying skin tones too thickly or without proper glazing—with tempera, building luminous skin requires multiple thin, layered applications, not one opaque coat.

measured difficulty