The evidential value of black cotton fibres

Resonance Raman and UV–visible spectroscopy of black dyes on textiles

“…1000-1700 cm À1 , where the strongest and most characteristic dye bands generally occur, along with reporting their UV-visible spectra. Black is the most common textile and forensic fibre colour [35][36][37][38], and we report examples of textiles dyed with single dyes and with dye mixtures; black and nearblack colours are commonly obtained either from single black dyes, which often appear blue at low uptake (i.e., low dye loading), or from single blue dyes used at high uptake (i.e., high dye loading), or from mixtures such as trichromatic combinations of red, yellow and blue dyes that together give a black colour. Our report focuses on cotton, which is the most common textile [35][36][37][38], but also includes data from viscose, polyester, nylon, and acrylic textiles.…”

The European Fibres Group (EFG) 1993?2002: "Understanding and improving the evidential value of fibres"

“…Some may think, for example, that all black cotton fibres are the same and hence their evidential value is low. Luckily a recent publication [25] has shown this assumption to be completely wrong. In recent years there have been a few studies looking at "blocks of colour" [26,27,28,29].…”

Extraction and Analysis of Disperse Dyes from Colored Polyester Single Fibers Using Liquid Chromatography/Linear Ion Trap Tandem Mass Spectrometry

“…1,2 Many studies have been conducted to analyze the dyes in colored fibers using microspectrophotometry, [3][4][5][6][7][8][9][10] TLC, [11][12][13][14][15][16][17][18][19] HPLC, [20][21][22][23][24][25] and LC/MS, [26][27][28][29][30] because these dyes can provide significant information in forensic analyses.…”