Fig. 2
From: Beam characterization of a microfading tester: evaluation of several methods
Examples of MFT measurements: a technical drawing from the collection of the Coal Mining Museum in Zabrze, Poland; b large-format pastel artwork on paper by Stanisław Wyspiański (measurement carried out through glass on a vertical surface); c fragment of the painting “The Ecstasy of St Francis” by El Greco from the Diocesan Museum in Siedlce, Poland; d area of fresco paintings at the The Church of the Holy Trinity in Lublin, Poland (measurement on a vertical surface)