Trzcińska Beata, Kowalski Rafał, Zięba-Palus Janina
Institute of Forensic Research, Westerplatte 9, 31-033 Krakow, Poland.
Institute of Forensic Research, Westerplatte 9, 31-033 Krakow, Poland.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Sep 15;130:534-8. doi: 10.1016/j.saa.2014.03.099. Epub 2014 Apr 13.
The aim of the paper was to evaluate the influence of pigment concentration and its distribution in polymer binder on the possibility of colour identification and paint sample comparison. Two sets of paint samples: one containing red and another one green pigment were prepared. Each set consisted of 13 samples differing gradually in the concentration of pigment. To obtain the sets of various colour shades white paint was mixed with the appropriate pigment in the form of a concentrated suspension. After solvents evaporation the samples were examined using spectrometric methods. The resin and main filler were identified by IR method. Colour and white pigments were identified on the base of Raman spectra. Colour of samples were compared based on Vis spectrometry according to colour theory. It was found that samples are homogenous (parameter measuring colour similarity ΔE<3). The values of ΔE between the neighbouring samples in the set revealed decreasing linear function and between the first and following one--a logarithmic function.
本文的目的是评估颜料浓度及其在聚合物粘合剂中的分布对颜色识别和油漆样品比较可能性的影响。制备了两组油漆样品：一组含有红色颜料，另一组含有绿色颜料。每组由13个样品组成，颜料浓度逐渐不同。为了获得各种颜色深浅的样品，将白色油漆与浓缩悬浮液形式的适当颜料混合。溶剂蒸发后，使用光谱方法对样品进行检查。通过红外方法鉴定树脂和主要填料。根据拉曼光谱鉴定颜色和白色颜料。根据颜色理论，基于可见光谱法比较样品的颜色。发现样品是均匀的（测量颜色相似度的参数ΔE<3）。该组中相邻样品之间的ΔE值呈现递减线性函数，而第一个样品与后续样品之间的ΔE值呈现对数函数。
