Red particles on fibers from the “blood” areas of the shroud. What are these red particles—iron oxide, possibly from paint used to forge the shroud image, or blood from the wounds of the man whose image is on the shroud? Scientist Joseph Kohlbeck recently performed a microscopic study of fibers removed from “blood” areas on both the front and back of the shroud. This single fiber, magnified 2,500 times, is from the “lance wound” area on the left side of the chest area. Red particles of varied sizes can be seen attached to the fiber. The lighter region outside the fiber is the sticky Mylar tape with which the fibers were removed from the shroud.