Radiocarbon dating:

https://www.britishmuseum.org/about_us Rot: The product of organic decomposition, sometimes seen in brown, white, or red particles on the object. /departments/conservation_and_science/research/scientific_techniques/radiocarbon_dating.aspx

Radiography:

https://www.britishmuseum.org/about_us/departments/conservation_and_science/research/scientific_techniques/radiography.aspx

Raman spectroscopy:

A non-destructive analytical tool used to identify materials that uses laser to highlight a materials unique light spectrum. https://www.britishmuseum.org/about_us/departments/conservation_and_science/research/scientific_techniques/raman_spectroscopy.aspx

Reconstruction:

Recto:

front of print/drawing/painting

Red rot:

Powdery crumbly surface specific to leather, sometimes with strong smell.

Relative Humidity:

The amount of water vapour present in the air expressed as a percentage of the amount needed for saturation at the same temperature/ Is the ratio of the actual partial vapour pressure of water to the saturation vapour pressure at that temperature or in very simplified terms the ratio of water in the specific atmosphere. Conservators control RH when trying to reach the optimum environmental conditions for materials.

Repair:

The act, task, or process of repairing an object. The repair may be an adhesive or consolidant, solder or rivet, patch, material support. If repair/adhesive weakens along a break-line, the join may widen and start to move.

Residue/Deposit (CGM):

Deposit of foreign matter on the surface. Maybe from original use.

Re-touching:

An interventive treatment referring to the use of paint, pigment or other to blend in losses to artefacts or artworks surfaces. This could be infilling losses in an oil painting on canvas or covering the unsightly appearance of a fill on a marble statue.

Reversible:

using materials and treatments that can be removed if necessary. Not making any permanent alterations to an object.

Rot:

The product of organic decomposition, sometimes seen in brown, white, or red particles on the object.