1851 Great Exhibition: Official Catalogue: Class X.: Tyree Brothers
From Graces Guide
299. TYREE BROTHERS, 44 Regent's Circus, Piccadilly — Inventor.
Daguerreotypes, including several, in which is introduced a new and ornamental process. The colouring by Mr. Alfred Tyree.
[In these daguerreotypes an effect somewhat resembling that of an engraved border has been produced. Such a result is capable of being attained by means of a perforated plate of metal laid over the picture and momentarily exposed to the light. The action of the light through the perforated parts will then produce, on exposure to the mercury, the engraved appearance.—R. E.]
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