Amount of Modern Biological Contaminant Required to Raise the Date of a 36 A.D. Shroud

According to McCrone, this graph shows the effect of the measured 1st century linen cloth of added 20th century carbon (mold, mildew, bacteria, etc.). The “shroud” weighs about 20 pounds (9 kg). Approximately 40 pounds (18 kg) of 20th century carbon contaminant would be required to raise the measured carbon date to 14th century.