Sharp Scale

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The Sharp Scale was devised by Henrietta Sharp Cockrell as an objective and scientific way to measure the opacity-translucency of paper, particularly of manuscript folios, 'in the field' without specialized equipment, for example in a museum or library setting. The folio is held at a distance of 15 cm. from a constant 60 watt light source (such as an unshaded table lamp). A dowel (or pencil) is held behind and against it, creating a silhouette. Folios are added until the outline of the pencil is no longer visible. The number of the folios needed to obscure the silhouette of the pencil is recorded.^[1]

Notes

↑ Savage-Smith, 2005, p. ???

References

Savage-Smith, Emilie (2005), A descriptive catalogue of Oriental manuscripts at St John's College, Oxford, Oxford:Oxford University Press. ISBN 0-19-920195-1
Savage-Smith, Emilie (2011) "A New Catalogue of Arabic Manuscripts in the Bodleian Library, University of Oxford, Vol.I, Medicine" Oxford University Press

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