Table 1 Drawings analyzed in this study, artists’ names, titles, dimensions, credit lines, and main media identified

From: Materiality and techniques revealed in drawings by Raphael, Leonardo da Vinci, and Perugino

Title, date

Short title

Artist, date

Dimensions

Credit line

Main components of media

Studies of the Christ Child, 1513–14

Studies of the Christ Child

Raphael (Raffaello Sanzio or Santi), Urbino, 1483–1520

8 5/8 × 6 9/16 in. (22 × 16.7 cm)

The Metropolitan Museum of Art, New York, Purchase, Florence B. Selden Bequest, 1997 (1997.75)

Red chalk, lead white highlights

Madonna and Child with the Infant Saint John the Baptist; upper left, Study for the Right Arm of the Infant Saint John; upper right, Study for Drapery (recto); Study of a Nude Male Figure (verso), ca. 1506–7

Madonna and Child (recto)Nude Male (verso)

Raphael (Raffaello Sanzio or Santi), Urbino, 1483–1520

8 13/16 × 6 1/4 in. (22.4 × 15.8 cm)

The Metropolitan Museum of Art, New York, Rogers Fund, 1964 (64.47)

Preparatory layer in recto and verso: SO4-2, CO3-2 and PO4-3 salts. Red chalk (recto); Pb metalpoint, iron gall ink (verso)

Lucretia, 1508-10

Lucretia

Raphael (Raffaello Sanzio or Santi), Urbino, 1483–1520

15 5/8 × 11 1/2 in. (39.7 × 29.2 cm)

The Metropolitan Museum of Art, New York, Purchase, Lila Acheson Wallace Gift, 1997, (1997.153)

Preparatory layer: Al, Si, P, S, Cl, K, and Ca; CaCO3. Iron gall ink, carbon-based black (recto); carbon-based black medium for transfer (verso)

Small Head of a Christ Child or Saint John the Baptist, 1504-1505

Small Head

Raphael (Raffaello Sanzio or Santi), Urbino, 1483–1520

4 1/2 × 3 11/16 in. (11.4 × 9.3 cm

Private Collection

Red chalk, small stroke of iron gall ink, Pb metalpoint (recto); iron gall ink, carbon-based black (verso)

Study of a Kneeling Youth and of the Head of Another, 1500

Study of a Kneeling Youth

Perugino (Pietro di Cristoforo Vannucci), Città della Pieve, active by 1469–died 1523 Fontignano

8 11/16 × 4 1/2 in. (22 × 11.5 cm)

The Metropolitan Museum of Art, New York, Bequest of Walter C. Baker, 1971 (1972.118.265)

Preparatory layer: bone ash (Ca, P; PO4-3 band), CaCO3a. Ag-Hg metalpoint, carbon-based black/s

Compositional Sketches for the Virgin Adoring the Christ Child, with and without the Infant St. John the Baptist; Diagram of a Perspectival Projection (recto); Slight Doodles (verso), 1480-85

Compositional Sketches for Virgin Adoring the Christ Child

Leonardo da Vinci, Vinci 1452–1519 Amboise

7 5/8 × 6 3/8 in. (19.3 × 16.2 cm)

The Metropolitan Museum of Art, New York, Rogers Fund, 1917 (17.142.1)

Preparatory layer in recto: red lead, bone ash (Ca, P; PO4-3 band), CaCO3a. Ag-Hg metalpoint that contains some Cu; iron gall ink

  1. aBone ash is primarily composed of hydroxyapatite but it may contain some calcite. In the case of these drawings, it is not possible to state if the CaCO3 observed is a component of the bone ash, if it was mixed with it, or both.