Description
Magnetic-based powders consist of colorants wrapped around iron filings. They are applied with the use of a magnet embedded inside a plastic or non-ferrous metal wand which attracts the filings and creates a clump or ball of powder. When the iron fillings are “rubbed” over the print surface, the colorant is deposited as it comes into contact with the oily residue. This process develops the image with little or no abrasive contact to the residue thus making magnetic-based powders ideal for more delicate type evidence. They are designed to work on some porous surfaces and non-porous surfaces like plastic, Styrofoam, rubber and the like.
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