Mylar film
A thin (approximately 6 micrometre) polyester film stretched over the document under vacuum in the ESDA process; it conforms to the document micro-topography, transmitting the impression geometry to the electrostatic charge pattern.
A thin (approximately 6 micrometre) polyester film stretched over the document under vacuum in the ESDA process; it conforms to the document micro-topography, transmitting the impression geometry to the electrostatic charge pattern.
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