Table 1 Description of the six paintings: dimensions, materials and characteristics

Dimensions

530 × 900x14 mm

67 × 1310x33 mm

700 × 1370x25 mm

645 × 775x23 mm

655 × 855x30 mm

650 × 890x28 mm

Wood species

Populus alba L

Populus alba L

Populus alba L

Populus alba L

Populus alba L

Populus alba L

Boards

2 T boards (~ 40 mm from pith), 275 and 255 mm wide

3 R boards 170, 380 and 145 mm wide

4 boards; 1 T (~ 50 mm from pith) 185 mm wide; 3 R 165, 130 and 220 mm wide

2 T boards (~ 20 mm from pith), 210 and 435 mm wide

2 T boards (~ 50 mm from pith), 210 and 435 mm wide

3 boards; 1R 225 mm wide; 2 T (~ 60 mm from pith), 320 and 105 mm wide

Ground layer

Thick

Thick

Thick

Thick

Thin

Thin