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3D Scanning and Printing
3D Scanning and Printing
Surface Dirt and dust was removed using dry cleaning methods such as soft brushes and a museum vacuum on low suction with a net guard covering the nozzle.
This was followed by wet cleaning the surface of the pediment with Tri-Ammonium Citrate 2% in distilled water as it was the most affective in removing the engrained dirt and did not affect the state of the oil gilding. Acetone was used to treat the water gilding.
Surface Dirt and dust was removed using dry cleaning methods such as soft brushes and a museum vacuum on low suction with a net guard covering the nozzle.
This was followed by wet cleaning the surface of the pediment with Tri-Ammonium Citrate 2% in distilled water as it was the most affective in removing the engrained dirt and did not affect the state of the oil gilding. Acetone was used to treat the water gilding.
Once the gesso had dried it was then sanded down to make it smooth, level and matched the original appearance of the corner
Traditional Material Replacements
The traditional materials that were investigated for their surface quality and structural integrity were:
- Plaster of Paris (Plaster)
- Jesmonite
-Composition (Compo)
These three materials were analysed for any surface imperfections which might disrupt the surface presentation and quality of the their final casts. This included noting any air bubbles, scratches or lines/ creases in the set material.
Plaster Cast of Ornate Corner
Jesmonite Cast of Ornate Corner
Compo Cast of Ornate Corner
The three materials all had different surface qualities with Plaster displaying imperfections such as air bubbles, cracks and an uneven surface.
Jesmonite also showing air bubbles, however Compo showed little surface imperfections and picked up the detail of the mould the best out of the three materials. The only surface imperfections present on the compo were the crack lines from the original compo which had been picked up by the moulding process.
The structural integrity of the three materials was conducted on a Tensile Strength Machine. The results showed that plaster was the stiffest material, followed by jesmonite and then compo. However, compo was the only material that did not break structurally under the pressure of the plates of the machine, instead the material bended with the pressure, thus making the material more flexible and suitable for conservation purposes.
Gilding
Gilded Plaster pieces
Gilded Jesmonite pieces
Gilded Composition pieces
Testing was carried out on four different sizes to determine which would produce the best finish:
- Wundasize
- Special Gilding Size 1 hour clear
- Special Gilding Size 4 hour clear
- Special Gilding Size 20 hour clear
It was found that the 20 hour clear produced the best gilt finish where little tears and imperfections in the gold could be found upon application and completion.
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