Tape is commonly encountered in our environment. Often times we see tape as evidence in crimes committed against individuals such as kidnappings and homicides. The analysis of tape includes a physical match examination; determining if torn or cut pieces of tape could be directly associated back to a known roll of tape and then possibly followed by an examination of the physical and chemical characteristics of the tapes if a physical match examine is not possible. Duct tape, medical tape, electrical tape, filament tape, scotch tape, and masking tape could all be submitted to the laboratory for a tape examination.
Comparison of Tapes:
When comparing two tapes we look at the various components that make up the tape including the adhesive and backing film. If the tape is a cloth reinforced tape, like duct tape, then a fiber examination would also be part of the tape examination.
Components of Tape:
The FTIR instrument compares inorganic and organic Spectra generated by FTIR analysis compositions