School of Molecular and Life Sciences, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia.
Conservation Science Department, Indianapolis Museum of Art at Newfields, 4000 Michigan Road, Indianapolis, IN 46208-3326, USA.
Forensic Sci Int. 2024 Sep;362:112172. doi: 10.1016/j.forsciint.2024.112172. Epub 2024 Jul 31.
Here we present our preliminary studies into the inorganic pigments Han blue (BaCuSiO) and Han purple (BaCuSiO) as near-infrared luminescent fingerprint dusting powders. These pigments were developed in ancient China around 800 BCE and both show luminescence in the NIR region. There remains, however, ambiguity in the literature concerning their photophysical properties. Samples of Han blue and Han purple artist's pigments were characterized by optical microscopy, infrared, ultraviolet-visible absorbance and luminescence spectroscopy. Their performance as fingerprint dusting powders, without any further treatment, on non-porous surfaces were compared to exfoliated lipophilic coated Egyptian blue and commercial fluorescent powders in a pilot study. These results demonstrate for the first time that both ancient pigments show promise as alternative dusting powders for latent fingermarks.
在这里，我们介绍了我们对无机颜料汉蓝（BaCuSiO）和汉紫（BaCuSiO）作为近红外发光指印显现粉末的初步研究。这些颜料是在中国古代公元前 800 年左右开发的，两者在近红外区域都显示出发光性。然而，文献中关于它们的光物理性质仍然存在模糊性。汉蓝和汉紫艺术家颜料的样品通过光学显微镜、红外、紫外-可见吸收和发光光谱进行了表征。在一项初步研究中，将未经进一步处理的这两种颜料作为指印显现粉末，在非多孔表面上的性能与剥离的亲脂性涂层埃及蓝和商业荧光粉进行了比较。这些结果首次表明，这两种古代颜料都有可能成为替代潜伏指纹显现粉末。
