Plates type BB640 and BB520, formerly manufactured by HRTgmbh of Germany, are currently manufactured by Colourholographics Ltd of England (email@example.com). Although the results shown in this paper have been obtained with HRT plates, tests with Colourholographics plates have been recently performed and results are very close to those presented, specially regarding the anomalous D-LogE curve and the high density values achieved this paper deals with.
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