UVF Losses and retouches appear as black spots under ultraviolet light
Transcript
1. UVFLosses and retouches appear as black spotsunder
ultraviolet light
2. UVRCraquelure and morphology is moreevident in ultraviolet
reflected imagingsince ultraviolet light is reflected by thevarnish
which on the other hand istransparent for visible light. UVR
Ultraviolet Reflected can provide information on the pigments. The
white pigment used for the highlights is probably lead white but
not for sure titanium white its modern alternative since it looks
bright in this imaging since it is bouncing off ultraviolet light.
Titanium white on the contrary absorbs UV.
3. IRIn the infrared image its more obvious thefluid and thin
preparation which was givenwith a large and flat brush.IRThe
layering build up of this painting is quite essential. Under
theyellow ochre of hair there is just the thin preparation which
showsthe bare canvas. On the other hand lead white on the face is
muchmore opaque to the infrared and doesnt allow to see through
it.
4. IRFCThe blue mantle shows a red false colorsuggesting
ultramarine blue.IRFCThe green snake was painted probably withgreen
earth as pointed by the greenish falsecolor.
5. IRFRed and yellow cadmium pigments have astrong infrared
fluorescence so their usecan be easily inferred.
6. IRTR Losses appear as white dots due to the increased
transparency to the infrared coming from the paintings back
side.IRTRInfrared transmitted allows to gather someinformation on
the layering of the painting.Here is evident that the snake was
paintedafter the Madonna since there is no snakeunder the Madonnas
feet.
7. IRRInfrared Reflectography allows to seethrough the more
infrared-opaquepigments. The 3 infrared methods Infrared (IR),
Infrared Reflectography (IRR)and Infrared Transmitted (IRTR) - do
notshow an extensive underdrawing norpentimenti. Thus the painter
show to bewell trained in this traditional
devotionalcomposition.This is the only evident sign of
anunderdrawing. Probably the painter usedjust few strokes to define
all thecomposition.