What were the corrosion products and had they caused any weakening of the metal?
I ascertained the extent of corrosion on different metal types and produced a diagrammatic scheme indicating varying percentages of corrosion on the entire screen. The decision about the level of conservation was made based on this information. Conserving every square centimetre would take years, cost more money and would likely result in an unsatisfactory patchy, dull and irregular effect. It was decided to conserve the screen to resemble it’s appearance when installed in Hereford Cathedral in 1862 with treatment that would: • give the fabric of the screen the best long-term stability, both structurally and chemically • reinstate the full colour scheme with a sympathetic revival of damaged areas, keeping much of the early paint and gilding without removing all evidence of deterioration.The treatment proposal consisted of a combination of options 2 and 3 made by Rupert Harris: 1. Removal of surface dirt and all active, disfiguring corrosion with further loss of some paint and gilding f
