2. How do you know that there is real blood on the Shroud?
- How do you know that the image was not produced by radiation?
- How do you know that the image was not a scorch? How do you know that most of the Shroud had not been heated enough to start decomposition?
- How do you know that the radiocarbon sample was not valid for dating the Shroud of Turin?
- How do you know that the fire of AD 1532 did not start a long-term autocatalytic decomposition of the Turin Shroud?
- Why are there bands of different colored linen throughout the Shroud, and what do they prove about image formation mechanisms?
- How fast does cellulose (linen) decompose (produce a color) compared with the impurities found on the Shroud of Turin?
- How is it possible to get image only on the topmost surface of the cloth of the Turin Shroud?
- Can some simple, natural process explain a doubly-superficial image?
- How fast does a human body begin to decompose, and what are the products?
- How do you know that the flax fibers were not involved in image formation?
- Are there any other ways than radiocarbon to date the Shroud of Turin?
- What could be observed about image properties by looking at the damage from the fire of 1532?
- What options for future scientific study of the Shroud's history and image were lost as a result of the "restoration" of 2002?
- What are the optical and physical properties of flax fibers (linen)?
- What Shroud image properties have been observed objectively by scientific methods?
- Can the presence of a "bioplastic polymer" coating anywhere on the Turin Shroud be confirmed? Could it affect the radiocarbon age determination?
- Could a "bioplastic polymer" affect the radiocarbon age of the Shroud of Turin?
1. How do you know that the image on the Shroud of Turin was not painted?
Answer to # 2:
Alan Adler was an expert on porphyrins, the types of colored compounds seen in blood, chlorophyll, and many other natural products. He and Dr. John Heller, MD, studied the blood flecks on the STURP sampling tapes [Heller and Adler, Applied Optics 19, (16) 1980]. They converted the heme into its parent porphyrin, and they interpreted the spectra taken of blood spots by Gilbert and Gilbert. They concluded that the blood flecks are real blood. In addition to that, the x-ray-fluorescence spectra taken by STURP showed excess iron in blood areas, as expected for blood. Microchemical tests for proteins were positive in blood areas but not in any other parts of the Shroud.
Several claims have been made that the blood has been found to be type AB, and claims have been made about DNA testing. We sent blood flecks to the laboratory devoted to the study of ancient blood at the State University of New York. None of these claims could be confirmed. The blood appears to be so old that the DNA is badly fragmented. Dr. Andrew Merriwether at SUNY has said that "… anyone can walk in off the street and amplify DNA from anything. The hard part is not to amplify what you don't want and only amplify what you want (endogenous DNA vs contamination)." It is doubtful that good DNA analyses can be obtained from the Shroud.
It is almost certain that the blood spots are blood, but no definitive statements can be made about its nature or provenience, i.e., whether it is male and from the Near East.
© 2004 Daniel R. Porter, Bronxville, New York
