The BVDA America Silmark (Brown) is a low viscosity casting compound can be mixed with hardener and poured over the print developed with fingerprint powder. After the silicone rubber has cured, the fingerprint is lifted. Depending on the color of the fingerprint powder that was used, white or black silicone rubber is used for contrast. The white rubber has been formulated in such a way that backlighting of the cast is still possible.
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