Platen Glass
Definition
The flat transparent surface on which original documents are placed for scanning in a photocopier or flatbed scanner; contamination or scratches on the platen produce fixed-position marks in every copy made on that machine.
Related terms
- Copy Generation
- The number of copying steps between the original document and the copy under examination; each generation introduces resolution loss, noise amplification, and...
- CSID (Called Subscriber Identification)
- The configurable name string transmitted by a fax machine during session setup and printed in the fax header bar on the received...
- Fax Header Bar
- The line of text printed at the top of each received fax page under regulatory requirements (US FCC 47 CFR 68.318, UK...
- FTIR (Fourier Transform Infrared Spectroscopy)
- A vibrational spectroscopy technique used in toner analysis to identify the polymer backbone and functional group composition of toner binder material; ATR...
- Ghost Image
- A faint background impression of a previously copied document visible in a later photocopy, arising from incomplete cleaning of residual toner from...
- MMR Compression (Modified Modified READ)
- An ITU-T fax compression standard (T.6) used in high-quality fax transmission modes; produces characteristic compression artefacts visible in fine character strokes of...
- Polyester Toner
- A toner binder formulation based on polyester resin, dominant in office photocopiers and laser printers from the 2000s onward; characterised by FTIR...
- SEM-EDX
- Scanning electron microscopy with energy-dispersive X-ray spectroscopy. The electron beam excites characteristic X-rays from each element present in the target grain, giving...
- Trash Mark
- An extraneous mark appearing at a consistent position or periodic interval in photocopied documents, arising from platen glass contamination (fixed position) or...
Explained in
- Photocopier and Fax Examination, and Toner AnalysisThe flat transparent surface on which original documents are placed for scanning in a photocopier or flatbed scanner; contamination or scratches on the platen...