Difference between revisions of "File:39 Ultram.blue nat 500X pol.jpg"

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(Polarized photomicrograph of natural ultramarine blue at 500X. From the McCrone Paint Pigment Reference Set. Due to small particle size, it is ...)
 
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Revision as of 16:49, 20 April 2013

Ultramarine blue, natural

Polarized photomicrograph of natural ultramarine blue at 500X. From the McCrone Paint Pigment Reference Set. Due to small particle size, it is difficult to differentiate particles of Prussian blue from that of other pigments with an optical microscope. Sample provided by the MFA Scientific Research Lab.
Photo credit: Keith Lawrence, Museum of Fine Arts, Boston

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