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SILMARK brown is a silicone rubber casting material. With the high concentration of pigments in the material, even the strong lighting under a microscope cannot penetrate and reflect from particles beneath the surface of the cast, and optimum sharpness of the microscopic image is thus guaranteed.
SILMARK brown is available in two viscosities: low and medium. This low viscosity variant is for making test impressions in the lab (usually on an horizontal surface), where it will flow easily into the smallest details.
The medium viscosity material (C-2400) is meant for use at the scene of the crime, where marks are often found on vertical surfaces.
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