Optics and Spectroscopy

, Volume 114, Issue 6, pp 929–935 | Cite as

Phthalocyanine identification in paintings by reflectance spectroscopy. A laboratory and in situ study

  • G. Poldi
  • S. Caglio
Laser Optics


The importance of identifying pigments using non invasive (n.i.) analyses has gained increasing importance in the field of spectroscopy applied to art conservation and art studies. Among the large set of pigments synthesized and marketed during 20th century, surely phthalocyanine blue and green pigments occupy an important role in the field of painting (including restoration) and printing, thanks to their characteristics like brightness and fastness. This research focused on the most used phthalocyanine blue (PB15:1 and PB15:3) and green pigments (PG7), and on the possibility to identify these organic compounds using a methodology like reflectance spectroscopy in the UV, visible and near IR range (UV-vis-NIR RS), performed easily through portable instruments. Laboratory tests and three examples carried out on real paintings are discussed.


Phthalocyanine Green Pigment Reflectance Factor Copper Phthalocyanine Metal Phthalocyanine 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Pleiades Publishing, Ltd. 2013

Authors and Affiliations

  1. 1.CAV, Università degli Studi di BergamoBergamoItaly
  2. 2.DERALAB SrlSeregno (MB)Italy

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