Automated Reading

• To benefit from reduced automated mail postage rates, mailers must use windowed envelopes processed on Optical Character Readers (OCR) with high read rates.
• The quality of print on the insert is the biggest contributor to successful automated reading. The best patch material will not help printing that does not meet postal requirements.
• Most postal services recommend a low-gloss, low-haze film to prevent misreads. Too much gloss reflects OCR light and blinds the OCR unit; too much haze diffuses the OCR illumination and distorts address block information.
• Film must be consistently flat so it can remain in close contact with the envelope's contents. This is done by controlling the gauge and stiffness tolerances of PROCITE* window film. The process prevents bending and buckling (the cause of distortions and shadows that lead to misreads and sorting delays).
• The envelope can change dimensions if the paper it is made from loses or gains moisture during storage. Excessive moisture in the patch gum can cause the paper to swell. Both of these factors can result in window patches that are not flat.
• Dow recommends PROCITE window film for automated systems because the combined optical and physical characteristics are designed to meet the needs of postal operators.
• PROCITE film provides optimum balance of gloss and haze characteristics.