Ridge patterns of blood-transferred simulated fingerprints observed on fabrics via steam thermography

Interpol review of fingermarks and other body impressions 2016–2019

“… Preliminary/Pilot studies : Various approaches were proposed to detect blood-containing fingermarks: nanoparticles in suspension [ 310 , 399 , 402 ], water-soluble benzalole dyes [ 452 ], ortho-phenylenediamine and Zar-Pro™ strips [ 453 ], or aggregation-induced emission involving serum albumin and tetraphenylethene maleimide [ 454 ]. Steam thermography has been investigated further in its ability to image ridge details from blood fingermarks left on fabrics [ 455 ], with positive results for hydrophobic fabrics such as acrylic and polyester. Extracts of Glycine max root nodules were proposed to be used as artificial blood for their content in leghaemoglobin, structurally similar to human haemoglobin and which seems to react with heme-sensitive reagents and protein stains [ 456 ].…”

Mid-infrared emissivity of nylon, cotton, acrylic, and polyester fabrics as a function of moisture content

“…5,6 The Myrick laboratory recently reported steam thermography for imaging stains on fabrics through contrast in the apparent fabric temperature immediately on exposure to water vapor. 7,8 In our report we identified possible mechanisms for the apparent temperature contrast, one of which was differential infrared emissivity of the fabric on exposure to moisture. Moisture uptake is known to affect other textile properties such as swelling, heat transport, electrical conductivity, and the perceived comfort of clothing.…”

“…The purple acrylic, brown polyester, green nylon, and red cotton fabrics used in this study have been the subject of several publications by this laboratory, and are consolidated here in Table 1, along with the properties of the fabrics and the fibers they are composed of, including the dyes used for each fabric. 7,8,[22][23][24][25][26][27][28][29][30][31] Each fabric was commercially obtained undyed, and subsequently triple-dyed at North Carolina State University's Wilson College of Textiles in 2004.…”