plate no. 9958

La Bella Principessa - Portrait of Bianca Sforza

ink, gouache, vellum, woodHigh Renaissanceportraitportraitfigurehairdressprofileheadpiece

what to study here

It shows how a tight earth-tone range and one lit face can carry a portrait, with soft modeling set against crisp hair and headdress linework.

The visionGuide describes a profile head placed left of center against a nearly uniform golden-tan ground. Light comes from the upper left and falls on the forehead, cheek and neck. Study how the face is modeled: edges are soft, with no sharp break between light and shadow, and the nose casts no hard shadow. Then compare that with the hair and headdress, where fine parallel strokes define the braids and the woven pattern. The darkest values sit in the braided hair and the interior of the headdress, so the value structure reads in three zones: bright face, warm tan surround, dark accents. The observed palette is a narrow range of earth tones from ochre to deep umber. Note the contrast in handling: a soft, sculptural face against precise, deliberate linework in the hair. Squint at the image to check that the face holds as the lightest shape and the dark accents anchor it without competing. The medium listed is ink and gouache on vellum mounted on wood, so the soft transitions were made in that medium.

key decision

The painter kept the face in soft, gradual transitions with no hard shadow edges, and reserved precise linear work and the darkest values for the braided hair and headdress.

recreation guide

La Bella Principessa is a High Renaissance portrait attributed to Leonardo da Vinci, executed around 1498. The work is distinctive for its medium: it is painted in ink and gouache on vellum, mounted on wood. Unlike Leonardo’s more famous oil paintings on panel, this piece utilizes the opaque qualities of gouache (also known as body color or guazzo) to achieve a matte, solid finish that differs from the transparency of standard watercolor (Source 1). The artwork exemplifies the artist’s mastery of subtle modeling and smooth surface blending, characteristics often associated with his sfumato technique, where brushstrokes are rendered indistinguishable to create a soft, shadowy quality (Source 8). The use of vellum as a support is consistent with the tradition of illuminated manuscripts and miniatures, where gouache was frequently employed for its opacity and ability to form a superficial layer over the support (Source 1, Source 7).

estimated time

40-60 hours over 8-12 sessions

materials

6 items

steps

6 in sequence

materials

item	purpose	modern equivalent
Vellum	Primary painting support, providing a smooth, non-absorbent surface suitable for opaque watermedia.	High-quality calf skin vellum or synthetic vellum paper
Wood panel	Rigid backing to mount the vellum, preventing warping and providing structural stability.	Hardwood panel (e.g., poplar or oak), sanded smooth
Gouache (Body Color)	Opaque water-based paint for modeling forms and applying solid color layers.	Professional-grade opaque watercolor or gouache tubes (gum arabic binder)
Ink	For linear definition and underdrawing, as indicated by the medium description.	Iron gall ink or high-quality black drawing ink
Gum Arabic	Traditional binding agent for pigments, ensuring adhesion and flexibility on vellum.	Pure gum arabic solution
White filler (e.g., Chalk/Chinese White)	To increase opacity and reflective qualities of the paint, essential for the gouache technique.	Titanium white pigment or pre-mixed white gouache

preparation

surface prep

The vellum must be mounted onto a wood panel to ensure rigidity, as vellum can warp with humidity changes. The surface should be cleaned and possibly sized with a dilute gum arabic solution to prevent excessive absorption while allowing the gouache to adhere. Leonardo’s practice involved meticulous preparation; while specific sizing recipes for this piece are not detailed in the sources, the use of vellum implies a need for a stable, smooth ground that supports the opaque nature of gouache without bleeding (Source 1, Source 5).

underdrawing

The medium list includes 'ink,' suggesting a linear underdrawing phase. Leonardo likely used fine ink lines to establish the composition and contours before applying paint. This aligns with the general practice of using ink for precision in miniature and manuscript traditions (Source 7). The underdrawing should be light enough to be covered by the opaque gouache but precise enough to guide the modeling.

underpainting

Gouache is typically applied opaquely, so a traditional transparent underpainting (like grisaille in oil) is less relevant. However, the artist may have established tonal values with diluted ink or thin gouache washes to map out light and shadow before building up opaque layers. This approach leverages the 'quick coverage and total hiding power' of gouache (Source 1).

color palette

Flesh Tones

Lead white, vermilion, ochre, and black (historical); modern equivalents: Titanium white, cadmium red, yellow ochre, ivory black.

Modeling the face and hands, utilizing the high pigment-to-binder ratio of gouache for smooth transitions.

Deep Blacks/Dark Browns

Iron gall ink or lamp black mixed with gum arabic.

Hair, eyes, and deep shadows, providing contrast against the lighter vellum and flesh tones.

Jewelry Accents

Gold leaf or yellow ochre mixed with white for highlights.

The intricate jewelry and headdress, requiring the 'brilliant, intense colours' mentioned in contrast theory (Source 2).

Background Neutrals

Gray or sepia washes.

Creating a subdued backdrop that emphasizes the figure, consistent with Leonardo’s 'subdued colouring' (Source 8).

composition

The portrait features a three-quarter view of the subject, a common convention in High Renaissance portraiture. The composition likely emphasizes the face and hands, with 'unadorned dress' allowing the viewer to focus on the expression and modeling (Source 8). The background is likely neutral or subtly modeled to avoid distracting from the figure, consistent with Leonardo’s tendency to use dramatic or subdued backgrounds to enhance the subject’s presence (Source 8).

step by step

underdrawing→first pass→refining→finishing

underdrawing

step 01
Mount the vellum securely on the wood panel. Using fine ink, sketch the basic proportions and contours of the face, hands, and jewelry. Ensure lines are precise but light, as they will be covered.
Tip — Work slowly to avoid tearing the vellum. Use a sharp pen or fine brush.
Linear Underdrawing

first pass

step 02
Apply thin washes of diluted gouache or ink to establish the basic tonal values. Map out the light source and shadow areas. This step utilizes the water-soluble nature of the medium to create initial depth.
Tip — Allow each layer to dry completely before adding more to prevent muddiness.
Wash Technique

refining

step 03
Build up opaque layers of gouache to model the forms. Use the 'high ratio of pigment to binder' to achieve solid coverage. Blend carefully to eliminate brushstrokes, aiming for the 'extremely smooth nature' characteristic of Leonardo’s work.
Tip — Gouache dries lighter or darker than when wet; test colors on a scrap piece of vellum to match tones accurately (Source 1).
Opaque Modeling
step 04
Focus on the face and hands. Use subtle gradations of tone to create the 'sfumato' effect, where shadows blend softly into light. Avoid hard edges unless defining specific details like jewelry.
Tip — Use a dry brush to lift paint or blend edges gently. The goal is to make brushstrokes 'indistinguishable' (Source 8).
Sfumato

finishing

step 05
Add final highlights and details to the jewelry and eyes. Use the 'brilliant, intense colours' for accents to create contrast against the subdued background and flesh tones.
Tip — Be cautious with wet-on-wet techniques on vellum, as it can cause buckling. Work in small areas.
Detailing
step 06
Inspect the painting for any visible brushstrokes or uneven tones. Make final adjustments to ensure the 'matte finish' is uniform and the image has the 'lively' quality described in Leonardo’s portraits.
Tip — Gouache can be rewetted, allowing for corrections, but overworking can damage the vellum surface.
Final Review

critical techniques

Gouache Opacity

Using the high pigment-to-binder ratio and white fillers to create solid, opaque layers that cover the underdrawing and previous washes. This allows for direct painting and correction.

Sfumato

Blending tones so smoothly that transitions are imperceptible, creating a 'shadowy quality' and 'lively' appearance. This is achieved through careful layering and softening of edges.

Color Contrast

Using the 'law of simultaneous contrast' to enhance the vibrancy of colors by placing complementary tones adjacent to each other, particularly in the jewelry and facial features.

common pitfalls

→Gouache dries to a different value than when wet, which can lead to mismatched tones if not tested beforehand (Source 1).
→Overworking the vellum surface can cause tearing or buckling, especially when rewetting areas for corrections (Source 1).
→Failing to blend brushstrokes can result in a visible texture that contradicts the 'smooth nature' of Leonardo’s technique (Source 8).
→Ignoring the 'simultaneous contrast' of colors can lead to dull or inaccurate color perception, as the eye is susceptible to fatigue and complementary afterimages (Source 4).

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 pigment recipes used by Leonardo for this particular work are not detailed in the sources.
·The exact method of mounting the vellum to the wood panel (adhesive type, tensioning) is not specified.
·The specific composition details (e.g., exact jewelry design, facial expression nuances) are not described in the provided sources, relying instead on general knowledge of the artwork.
·The role of ink in the final image (whether it remains visible or is fully covered) is not explicitly clarified.

grounded in

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

Laws of Contrast of Colour↗
- 442. Among the harmonies of contrast of tone — applied to Guidance on using color contrast, particularly with bright accents against darker backgrounds.
- 315. As to the advantages the painter will find in it — applied to Understanding simultaneous contrast and its impact on color perception during painting.
The Practice of Oil Painting↗
- ON COPYING — applied to General advice on copying works to improve technique, though less directly applicable to the specific medium.

cross-referenced from

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

Wikipedia: Gouache↗
- Gouache — part 1 — applied to Understanding the properties of gouache, its opacity, drying behavior, and suitability for vellum.
- Gouache — part 2 — applied to Historical context of gouache use in manuscripts and miniatures, supporting the medium choice.
Wikipedia bio — Leonardo da Vinci↗
- Leonardo da Vinci — part 16 — applied to Insights into Leonardo’s sfumato technique, smooth blending, and subdued coloring.

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

Light falls from the upper left, modeling the sitter's profile with a gentle, frontal glow that emphasizes the planes of the face and neck. The dominant mass is the profile head, positioned left-of-center, with the elaborate braided hair structure pulling the eye rightward and backward into deep shadow. The background is a warm, nearly uniform golden-tan that isolates the figure without competing. The eye enters at the sharply lit forehead, travels down the refined nose and lips, then is drawn into the intricate geometry of the headdress and its braided wrap.

value structure

The lightest values cluster on the face itself—the forehead, cheek, and neck receive the brightest light. Mid-tones dominate the background and much of the garment. The darkest darks appear in the braided hair structure, the interior shadows of the headdress, and the upper-left background behind the head. Squint and you see three clear zones: a bright face, a warm-tan surround, and dark accents in hair and headdress that anchor the composition.

observed palette and mixes

#b19e65
yellow ochre + titanium white + touch of raw umber
primary background and dominant mid-tone across the entire composition
#a7945e
yellow ochre + raw umber + white
face plane—forehead, cheek, and neck receiving direct light
#998655
burnt sienna + raw umber + yellow ochre
shadow planes on the face, particularly cheek underplane and neck shadow
#796842
raw umber + burnt sienna
hair strands and interior shadows of the braided headdress
#645738
raw umber + burnt sienna + touch of black or dark earth pigment
deepest shadows within the braided structure and headdress geometry
#4b442e
raw umber + burnt sienna + ivory black
final darkest accents defining the hair volume and headdress ribs

edges and brushwork

Edges are remarkably soft and modeled throughout the face—no sharp transitions between light and shadow, only gentle gradations that suggest form. The hair and headdress receive more deliberate linework: you can see fine, parallel strokes that define the braids and the woven pattern, executed with precision but never harsh. The background is nearly featureless, a unified wash that recedes.

a working sequence

01
Establish the golden ground
Lay down a thin, even wash of your yellow ochre + white + raw umber mix across the entire surface. This warm tan is your atmospheric base and should be completely dry before proceeding. Do not overwork it; one pass is enough. This color is the breathing room around the figure.
02
Block the profile silhouette and headdress geometry
Using a medium flat brush and a thin mix of raw umber + burnt sienna, lightly indicate the profile outline—forehead, nose, lips, chin, and neck. Then map the headdress: sketch the band across the crown, the braided tail descending the back, and the wrapped section at the nape. Keep these lines light and proportional; check the angle of the profile against the vertical and the position of the headdress relative to the shoulder.
03
Model the face planes with shadow
Using a small round brush and burnt sienna + raw umber + a touch of yellow ochre, begin laying in the shadow side of the face—under the cheekbone, along the jawline, and the full neck shadow on the right side. Let the background show through; these are thin glazes establishing volume, not opaque blocks. The forehead stays bright; the cheek receives the gentlest gradation from light at the apple to shadow underneath.
04
Refine facial anatomy with edge work
Using the same shadow mix on a very small round, soften all transitions on the face by working wet-into-wet or by dragging a nearly dry brush along the boundaries between light and shadow. Pay attention to the subtle plane where the cheek meets the temple, and where the neck curves away. The nose casts no sharp shadow here—it is integrated into the overall form. The eye socket should be suggested by the gentlest darkening, not carved.
05
Develop the hair structure and volume
Switch to a small round and use raw umber + burnt sienna to define the individual strands and the overall wave of hair falling past the shoulder. The hair is not flat; it has thickness and rolls. Use parallel, flowing strokes that follow the direction of the braids. Leave some of the mid-tone background showing through to suggest the hair's transparency in lighter areas; reserve your darkest mix for the deepest interior shadows where braids overlap.
06
Articulate the headdress ribs and weave pattern
Using a small round and the darker raw umber + burnt sienna mix, carefully define the geometric pattern on the headdress—you can see rectangular ribs and linear ornamental details. These lines are deliberate and precise, but not mechanical. They follow the cylindrical form of the headdress as it recedes. The wrapped section at the back should show parallel ribs that suggest fabric wrapped around form.
07
Deepen accents and unify darks
Mix your darkest value—raw umber + burnt sienna + a tiny amount of black if needed—and use it sparingly to define the deepest interior shadows of the braids and the darkest recesses of the headdress. These accents anchor the whole composition and make the lit face sing by contrast. Do not overuse; let them sit only where light cannot reach.
08
Final modeling and refinement
Step back and assess the overall value progression from brightest face to warm background to dark accents. Using a barely-damp, small round with a touch of your mid-tone mix, soften any remaining hard edges on the face, neck, and shoulder. Check the profile against a straightedge; check proportions of head to headdress. Add any final delicate details in the eye (a pinpoint highlight, a soft shadow) and ensure the lips and nostrils are suggested, not outlined.

where studies of this painting go wrong

Treating the background as neutral gray instead of the warm, golden tan it actually is—this will flatten the composition and kill the luminosity that frames the face.
Overworking the face with too much shadow or too many value transitions, when in fact the modeling here is subtle, almost imperceptible. Squint frequently to see only the largest light and shadow shapes.
Making the hair and headdress too uniform in tone instead of reading it as a complex, overlapping structure with distinct ribs, braids, and deep interior cavities that trap shadow.
Sharpening edges on the profile or face itself—this is a soft, almost sculptural rendering. Edges should feel modeled, not drawn.

measured difficulty