In physical tampering prevention technique, hidden images can be seen only when the check is held at an angle through:
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A. B. C. D.C
In physical tampering prevention techniques, hidden images can be seen only when the check is held at an angle through the use of holographic safety inks.
Holographic safety inks are a security feature used to protect checks and other valuable documents from counterfeiting and tampering. These inks contain microscopic particles that create a three-dimensional effect, producing a holographic image. The hidden images or patterns created with holographic safety inks are not easily visible under normal lighting conditions.
To detect these hidden images, one needs to hold the check at an angle to the light source. When the check is tilted, the holographic safety inks reflect light differently, revealing the hidden images or patterns. This is due to the unique properties of the microscopic particles within the ink, which diffract light and create the illusion of depth and movement.
The purpose of using holographic safety inks is to provide an additional layer of security and deter potential fraudsters. By incorporating hidden images or patterns that can only be seen under specific viewing conditions, it becomes more difficult for counterfeiters to reproduce or alter checks accurately.
Option B, holographic safety inks, is the correct answer in this case as it specifically refers to the technique of using these inks to create hidden images visible only when the check is held at an angle. The other options listed do not correspond to this specific technique:
Therefore, the correct answer is B. Holographic safety inks.