Software for categorization of VIS ink spectra

The software for categorization of VIS ink spectra in the form of a web application allows to analyze and compare spectrograms obtained from texts written with unknown writing instruments or unknown inks on the basis of VIS ink spectra. A writing instrument is understood to be, for example, a ballpoint pen, a gel pen or a fountain pen, but also rollers and liners of a specific brand and a specific ink colour and type.