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Wikipedia Text: Painting
In 1977, a team of scientists selected by the Holy Shroud Guild developed a program of tests to conduct on the Shroud, designated the Shroud of Turin Research Project (STURP). Cardinal Ballestrero, the archbishop of Turin, granted permission, despite disagreement within the Church. The STURP scientists conducted their testing over five days in 1978. Walter McCrone, a member of the team, upon analyzing the samples he had, concluded in 1979 that the image is actually made up of billions of submicron pigment particles. The only fibrils that had been made available for testing of the stains were those that remained affixed to custom-designed adhesive-backed tape applied to thirty-two different sections of the image. (This was done in order to avoid damaging the cloth.) According to McCrone, the pigments used were a combination of red ochre and vermilion tempera paint. The Electron Optics Group of McCrone Associates published the results of these studies in five articles in peer-reviewed journals: Microscope 1980, 28, 105, 115; 1981, 29, 19; Wiener Berichte uber Naturwissenschaft in der Kunst 1987/1988, 4/5, 50 and Acc. Chem. Res. 1990, 23, 77-83. STURP, upon learning of his findings, confiscated McCrone's samples and brought in other scientists to replace him. In McCrone's words, he was "drummed out" of STURP, and continued to defend the analysis he had performed, becoming a prominent proponent of the position that the Shroud is a forgery. As of 2004, no other scientists have confirmed McCrone's results with independent experiments.
Other microscopic analysis of the fibers seems to indicate that the image is strictly limited to the carbohydrate layer, with no additional layer of pigment visible. Proponents of the position that the Shroud is authentic say that no known technique for hand-application of paint could apply a pigment with the necessary degree of control on such a nano-scale fibrillar surface plane.
In the program "Decoding The Past: The Shroud of Turin", The History Channel reported the official finding of STURP that no pigments were found in the shroud image, and multiple scientists asserted this conclusion on camera. No hint of controversy over this claim was suggested. The program stated that a NASA scientist organized STURP in 1976 (after being surprised to find depth-dimensional information encoded within the shroud image); no mention of the Holy Shroud Guild was made.
There are many reason that the painting theory is completely invalid . . . See:
Painting
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