What instrument is used for Arabic digital alteration identification?

1. Spectrometer: By detecting the spectral characteristics of the altered part and the original part, it can be judged whether there is alteration.

2. Ultraviolet lamp: The fluorescence reaction between the modified part and the original part can be observed when irradiated with ultraviolet lamp. If there is alteration, the fluorescence reaction of the altered part will be different from that of the original part.

3. Microscope: By observing the details of the altered part and the original part through a microscope, such as the particle size and distribution of the ink, it can be judged whether there is any alteration.