FINDING HIDDEN INFORMATION IN THE INFRARED SPECTRUM IN PAINTINGS IN THE CARMELITE MONASTERY IN REMETE AND A PRIVATE COLLECTION IN ZAGREB

Sažetak

In this work, two paintings photographed in visual
and near infrared (NIR) area are selected among
1426 photographs taken in seven museums, three
collections, ten temporary exhibitions and five
private collections in Zagreb, Croatia.
The topic of this work is the paintings
discovered underneath these two paintings.
Therefore, the paintings have two separate
conditions in different spectral areas. The
article shows the differences between these
two images in these spectral areas using RGB
cameras. Here, a ZRGB camera was used, which
records visual and NIR spectra on Z value [1].
The aim of this research is to determine the
conditions of the paintings in NIR spectrum to
find the overlapping data in the layer underneath
the visible painting, which are not visible to
the naked eye. It has been proposed that the
conservation and restoration procedures take into
consideration these two conditions of the image,
and that the paintings be photographed in NIR
after the restoration. The results of the research
are part of the doctorate thesis on the topic:
Paintings in the infrared area – postponing the
visible.