True color micro images or photographs, as small as three square millimeters, require the use of a loupe or magnifying glass to authenticate.
Diﬀractive or non-diﬀractive micro text, that can be as small as 175 microns high, is clearly viewed only with an eye loupe or magnifying glass with 10x to 20x magniﬁcation. ITW Security Division’s origination equipment is capable of producing perfectly formed text that is far beyond the capability of standard, commercially available holographic equipment.
Single Axis CLR
Covert Laser Retrievable (CLR) images and characters, which are invisible to the human eye, can be viewed only by illuminating the coded area with a laser device and looking at the refracted light projected onto a screen made of paper held at right angles to the hologram; or with a special, hand-held laser reader with an integral screen. This is an excellent covert feature, but does require the use of additional equipment for interrogation.