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  • ESDA 2
  • ESDA 2
  • ESDA 2

The leading electrostatic imaging system for detecting intented writing

ESDA® works by creating an electrostatic image of indented writing, which is then visualised by the application of charge sensitive toners. The sensitive imaging process reacts to sites of microscopic damages to fibres at the surface of a document, which have been created by abrasive interaction with overlying surfaces during the act of handwriting.

ESDA®2 features:

  • Creation of  permanent records

  • Repeatable without loss of information

  • Effective on old documents

  • A3-sized document bed

  • Original cascade development method

  • Improved toner pad development

  • Optional aerosol hood for ‘powder cloud’ development

  • Replaceable vacuum bed


ESDA®2 applications:


ESDA® is the ideal forensic tool. As well as being simple to operate, it produces positive, life-size transparencies of indented writing without damage or contamination to original documents and without interference to other forensic tests, and documents may be processed repeatedly without loss of sensitivity.
Domain: Forensic