Abstract Fiber-tip pens have become one of the most popular writing instruments, especially for signatures, artworks, and projects. As with any other writing instrument, the forensic significance of fiber-tip pens can’t be undermined. They are often encountered in cases of disputed signature, sketches, drawings, architectural projects, technical designs, and multi-colored unlawful posters. In such cases, it becomes important to establish the identity of the writer: source identification of ink can also provide a clue in this concern. However, it is a contradiction that in spite of being an extremely popular writing instrument, unlike other types of ink, so little analytical work has been done on the fiber-tip pen inks. Although a few previous studies are available on fiber-tip pens, they are all directed towards determining the composition of the inks. In the present study, an attempt has been made to classify fiber-tip pens of black, red, green, and black color of different brands into their respective brands using Attenuated total reflectance (ATR) – Fourier transform infrared (FTIR) spectroscopy supplemented with Principal component analysis (PCA), and Linear discriminant analysis (LDA).

中文翻译：

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使用衰减全反射 (ATR) – 傅立叶变换红外 (FTIR) 光谱与化学计量学结合对纤维笔尖进行分类

摘要 纤维笔已成为最受欢迎的书写工具之一，尤其是用于签名、艺术品和项目。与任何其他书写工具一样，纤维笔尖笔的法医意义不容小觑。他们经常遇到有争议的签名、草图、图纸、建筑项目、技术设计和多色非法海报。在这种情况下，确定作者的身份就变得很重要：墨水的来源识别也可以提供这一问题的线索。然而，矛盾的是，尽管是一种非常受欢迎的书写工具，但与其他类型的墨水不同，对纤维笔墨水的分析工作很少。虽然之前有一些关于纤维笔尖的研究，它们都旨在确定墨水的成分。在本研究中，尝试使用衰减全反射 (ATR) – 傅里叶变换红外 (FTIR) 光谱法将不同品牌的黑色、红色、绿色和黑色纤维笔尖分类为各自的品牌。主成分分析 (PCA) 和线性判别分析 (LDA)。