Sentences with phrase «only under ultraviolet light»
The virtually indelible mixture is visible only under ultraviolet light, but when analysed, shows a unique profile, proving beyond doubt who owns the property.
http://www.educationbusinessuk.net/ Not exact matches
They also were marked with a unique design that could only be viewed under ultraviolet light.
They conclude that ultraviolet markings may be clearly visible under a range of lighting conditions, but only to birds with the so called UVS type of ultraviolet vision.
For the $ 100 bill, some of the security features include: a watermark that's visible only when the bill is held up to a light source; inks that change color when the note is tilted; a security thread that glows under ultraviolet light; a 3D security ribbon; and raised printing.
The e-passport will now be valid for a period of 10 years and contain a data chip inside it that can be read electronically to provide border officials with the bearer's information, holographic images and a hidden photo of the bearer that can only be viewed under ultraviolet light.