- Temporary Exhibition
- Legs: Loss of wood around joints. Right knee cap, Right ankle and foot, lower L leg. Extensive loss on left foot approx. 50% missing. (Not treatment undertaken)
Tortoise head: Loosely in position. Adhered with 30% Vinamul 3252 in water (see below).
Torso surface layers: Gesso - General loss of layers adjacent to the wood and between the cloth and bitumen. The remaining gesso is stained but firmly attached. Does not appear friable to the touch. Cloth - Degraded, discoloured. The edges are frayed with large areas of loss. Due to gesso loss below, areas of cloth are lifitng. Bitumen - Cracked, abraded with loss areas of pale blooming and dull surfaces. Treastment: Spot tests with white spirit and water indicated minimal staining and discoloration. Stabilized areas of seperating cloth, gesso and bitumen with 1-2 brush applications os 20%v/v Vinamul 3252 (vinyl acetate ethylene copolymer and water) solution. The areas were wetted prior with white spirit to break the surface tension. After Vinamul application the areas were dabbed with tissue to remove excess, isolated with Mylar (polyethylene terepthalate) and held under hand pressure until dry. Areas treate: edge of R hand, upper arm, upper right arm, lower centre back, Left hip, Left and right sides, rear of headress, right side of head, underside of front head, neck of tortoise in cavity of head. Results: Layers appear secured. No blooming of the bitumen occured. Exposed edges of the cloth have darkened (possibly due to solublization in transfer of staining from degraded wood).
Base: Degraded, stained, dry powdery and cracked surfaces. Abraded with loss especially on the front and rear ends and left side near knots int he wood. Brush/ vacuumed to remove loose surface dirt and dust deposits. Consolidated the dry and powdery surfaces with 1-2 brush applications of 2.5% w/v Paraloid B72 (ethyl methacrylate copolymer) in xylenesolution. Areas treated: underside of tbase, right side, rear left side, rear side around knots of wood. Results: Some discoloration darkening of wood, surfaces are stable to touch.
Bitumen: Cracked and abraded with loss surfaces are dirty and dull white deposits occur randomly. Lightly brushed and vacuumed to remove surface dirt deposits. Little damage occured as firmly attached.
Figure wood: Constructed from a number of pieces dowelled together.
Figure torso: Generally stable. Small cracks with fibre loss occur on the rear and arms. Areas of abrasion and loss at rear of head.
Figure torse lower right half: Large crack extends from the right side into the body of torso for a depth of approx. 1.5cm. Width of the opening varies from 3-5mm.
Figure legs: Some staining and discoloration of the wood. Generally sound.
All above brush/vacuumed to remove loose surface dirt/dust deposits. Attempts at removal of more ingrained dirt were made by rolling swabs slightly dampened with the foam of 1% v/v Synperonic NDB (non-ionic detergent -nonyylphenol ethylene oxide conc. based) in water solution. Areas treated; Right and left shoulder. crown of head, Lef and right knee, both hands and reight elbow.
Torso surface layers at rear of headdress: Layers seperated from wooded support. Loss of gesso between cloth and wood. Bitumen and gesso cracked and loss. The layers reattached to the wooded support by slipping small pieces of tf Paraloid F10 (butyl methacrylate polymer) fim underneath the cloth and then reactivating with acetone. A piece of Mylar (polyethylene terephthalate) was used to isolate areas before gentle hand pressure was applied.
Torso, feet, right and left forearms and right shoulder, right and left thighs, lower right back: Most of teh joints are filled with hard grey-brown coloured medium. small pieces of bitumen cought in the surface layers. The filler extends over onto wood cloth and gesso and bitumen. A thinner application of filler under the left arm is cracked and lifting. Spot tests of fillerindicated water would swell and partially solubilize. Areas of excess filler were applied with a 2-3mm layer of 7% w/v laponiteRD ( synthetic inorganic colloid) in water solution. The gel was left in position for 10-15 minutes before being gently scraped away. Rinses of water dampened swabs followed. Results Laponite proved successful in allowing the removal of the filler without causing damage to the adjacent wood and gesso (i.e. staining or abrasion). Areas treated; Right elbow and shoulder, lower right back, left hip, under left arm. Other areas of filler were left as they served a structural function and were less visually noticeable. An area of previous restoration on the left foot was inpainted with Rowney cryla acrylic colours to help blend it to the surroundings.
Torso rear: Registration number written: 1912,2-10.44
Base upper edge: Registration number written: 50705