Study of security features present in Nepali passport

Security features present on Nepali passport are examined with the help of Video Spectral Comparator. Mainly examination is carried out with application ultra-violet light, normal light, oblique light and transmitted light. We obtain different types of security features including florescence, ghost image, binding thread, optical fiber, punched number, barcode, micro-printing, watermark, emboss etc.

Từ khóa: Security feature, Light source, Non-destructive, Optical fiber, Punched number, Micro-printing