Our Hidden Message Ultra Sensitive Tamper Evident Labels are made with a patented optical film. The labels react to pressure during attempted removal, so the hidden message is revealed upon attempted removal. The hidden message remains permanently on the tamper seal, so the labels are ideal for use as an authenticator or tamper indicator. The security seal does not require layer separation in order to activate and never leaves a residue on the target surface.
The labels are available in a variety of metallic colors and custom messages, serial numbers and barcodes.