Multimode Imaging in the Thermal Infrared for Chemical Contrast Enhancement. Part 3: Visualizing Blood on Fabrics

It noted contrast differences between the clean fabric and the fabric stained with blood diluted as low as 1:100. It also demonstrated that this method can be used to discriminate between a bloodstain and four common interfering agents (bleach, rust, cherry soda, and coffee) to other blood detection methods. These results indicate that this system could be useful for crime-scene investigations by focusing nondestructive attention on areas more likely to be suitable for further analysis. (publisher abstract modified)