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Changing Colors
Scientists had acknowledge an odd color change come about in Vincent Van Gogh ’s " Flowers in a puritanic vase , " which he paint in Paris in 1887 . Apparently , the yellows were call on orange - gray over time ( see the discolouration in the upper right ) . Researchers reporting in the journal Analytical Chemistry have found a chemical reaction at the interface of a protective varnish and the pigment is the perpetrator . The box show where tiny blusher samples were taken for analysis .
Yellow to Orange
The color - change ( from shiny yellowish to orangish - gray ) in Van Gogh ’s " heyday in a blue vase " can be seen to the right and upper right of the painting . Two microsamples were ask from these area .
Hidden Chemicals
From the tiny paint sampling ( shown in an ocular - microscope simulacrum ) , the researchers look at levels of four compound .
Paint Chips
Microsamples from art masterpieces , forge in Plexiglass plate quick for probe with synchrotron X - rays . The historical paint subway system at the bottom is from the personal collection of M. Cotte .
Tiny X-Rays
Artist ’s illustration of a Plexiglass crustal plate with a microsample mounted for investigation in the vacuum cleaner chamber of the synchrotron X - ray microscope . The humble spot in the center of the Plexiglass block is the sample distribution from the Van Gogh painting , and the cylindric pipe colligate it with the X - ray of light sensing element .
Losing Luster
Researchers have also analyzed Van Gogh ’s " banking concern of the Seine " ( 1887 ) , find a chemical chemical reaction caused the painting to recede its lustre .
