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Page 2 of 4

FURTHER CONSIDERATION OF PAINT MATERIALS (Continued)

These enquiries have been further assisted by another publication by Dover entitled "The materials and techniques of medieval painting" by Daniel V Thompson which has provided further information regarding the materials used around the time of the renaissance. This book too is a reprint of an original publication of 1956.

Because of the unexpected nature of the blue paint enquiries have been directed towards the blue and green colours which were available at the time or later.

The following pigments have been excluded as they contain metal elements which were not found on analysis:-

Phthalocyanine blue

Ultramarine blue

Natural lazurite

Maya blue

Prussian blue

Egyptian blue

Manganese blue

Blue verditer

Cobalt blue

Azurite

Cerulean blue

Phthalocyanine green

Verdigris

Chrysocolla

Green earth

Paris green

Malachite

Cobalt green

Viridian

Chrome green

Chromium oxide green

Mr H H Bland BSc C Chem FRSC

UK Forensic Science Services Ltd, Melbourn Science Park, Moat Lane, Melbourn, Royston Herts SG8 6EJ

5th September, 1988

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