COMMON TECHNIQUES
VIC SPECKLE PATTERN APPLICATION KIT
The VIC Speckle Pattern Application Kit contains an array of stamp rollers/rockers and stencil tools designed to consistently
produce optimal speckle patterns. The stamp rollers apply ink to the specimen by rolling dots onto the surface. The stamp
rockers are pressed onto the specimen, or specimen can be rolled over the unmounted stamp. The stamps have a range of
dot sizes so the correct speckle can be created depending on camera resolution and FOV. It is often necessary to apply a
base coat (often white paint) to the surface prior to stamping.
For stencil use, first apply a base coat of paint to the specimen. Once the base is dry, the stencils are pressed to the
specimen using a mount frame. Apply paint with several quick passes to sufficiently apply the pattern. Be careful not to
apply the paint too thick because it can seep through and the dots will merge together. Like the stamps, a range of stencil
sizes allows for the correct speckle size.
SPRAY PAINT
The most common technique for applying a speckle pattern is with ordinary paint. Paint can be used with any intermediate-
sized specimen that will not be chemically affected by the paint, nor stiffened by it. This is usually the best choice for metal,
ceramic, and composite specimens from ~1” (25mm) to ~48” (1.25m).
For best results using spray paint, use matte paints; satin of gloss paint can cause specular reflections, especially under
intense lighting.
Typically, the surface of the specimen is coated white, in several very light coats. Heavy coats may lead to drips forming
which change the shape of the surface. Once the base is somewhat dry, the speckles may be applied. If the base coat is still
wet, the paints will blend and blur.
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