Effect of Yarn Structure on Wicking and Its Impact on Bloodstain Pattern Analysis (BPA) on Woven Cotton Fabrics

In 1895, Piotrowski’s pioneering studies created a new forensic science, bloodstain pattern analysis BPA [1]. Today, BPA incorporates mathematics, physics and fluid mechanics and has had good success in describing the formation of bloodstains on hard, non-porous surfaces [2]. Balthazard et al. in 1939 were the first to report studies of bloodstains on textiles showing that textiles can alter the stain shape [3]. In 1986, White published his results on drip bloodstains on several different fabrics and for several different heights.

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