Serial numbers need not be strictly numerical. What does serial number mean?Ī serial number is a unique identifier assigned incrementally or sequentially to an item, to uniquely identify it. It has one significant advantage, which is speed. This is a highly successful technique, with particular application to restoring obliterated serial numbers on cast-iron substrates. What solution is used to restore obliterated serial numbers from firearms? The choice of restoration technique is determined by the type of metal involved, the process by which the serial number was marked on the firearms barrel or receiver, i.e., etching, casting, engraving, or stamping, and the method used to obliterate the serial number. What are three different methods you could use to restore an obliterated serial number? To reveal destroyed serial numbers on weapons made of nonmagnetic materials, such as zinc, aluminum or alloy substances, crime laboratories must still use chemical etching, a process that uses strong acids and typically reveals a serial number for only a few moments before possibly destroying it. Which chemical helps reveal a damaged serial number? What can be used to recover serial number?
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