256
Janusz Czop, Piotr Frączek, Julio M. del Hoyo-Melendez et al.
16.The composite absorption edge subtraction radiograph of 28 selected areas
of the Ladywithan Ermine.dhe radiograph presents a normalized difference of
W-Lct and W-L|3 signals, which is particularly sensitive to presence of copper.
Absence of distinctly brightened areas indicates the lack of details and objects
in the background painted with pigments whose main component is copper.
The brightened outline of the figurę is a result of strong absorption of W-Lct and
W-L|3 photons in a thick lead white laye
17. Image from the hyper-
spectral camera (2000 nm).
Visible a lighter, rectangular
area in the place of the in-
scription in the top left cor-
ner, a triangle area where the
overpaint layer was removed
in the top right corner and a
dark square stain on the right
hand side indicating a reto-
uching of the background
before its overpainting
Janusz Czop, Piotr Frączek, Julio M. del Hoyo-Melendez et al.
16.The composite absorption edge subtraction radiograph of 28 selected areas
of the Ladywithan Ermine.dhe radiograph presents a normalized difference of
W-Lct and W-L|3 signals, which is particularly sensitive to presence of copper.
Absence of distinctly brightened areas indicates the lack of details and objects
in the background painted with pigments whose main component is copper.
The brightened outline of the figurę is a result of strong absorption of W-Lct and
W-L|3 photons in a thick lead white laye
17. Image from the hyper-
spectral camera (2000 nm).
Visible a lighter, rectangular
area in the place of the in-
scription in the top left cor-
ner, a triangle area where the
overpaint layer was removed
in the top right corner and a
dark square stain on the right
hand side indicating a reto-
uching of the background
before its overpainting