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HP Deskjet 1220c, HP Deskjet 1180c, HP Color Inkjet cp1160 and cp1700, and HP Business Inkjet 2600 Series Printers - Auto Paper Sensor, Print Quality, and Speed Issues

Introduction
The HP Deskjet 1220C, HP Deskjet 1180C, HP Color Inkjet cp1160, HP Color Inkjet cp1700, and the HP Business Inkjet 2600 series printers have an Automatic Paper-Type sensor. Whether using plain paper or specialty media, such as photo papers or transparencies, the paper type will be detected and the printer will automatically set the drivers to produce a high quality print. The default setting in the driver is the Automatic Paper-Type sensor. See the “Manually selecting the paper type” section of this document for detailed instructions on manually selecting the paper type.
Information
Following is a brief description of how the Automatic Paper-Type sensor works.
  1. The paper is picked up from the tray and advanced to the print zone.
  2. A light-emitting diode (LED) shines onto the surface of the paper.
  3. The reflection of the light is captured and recognized. This reflection gives the printer information about the paper coating characteristics for the particular paper.
  4. This information is compared to a reference table of paper types that the printer has stored internally.
  5. Then, based on the information, the printer determines color mapping, half-toning, and number of print passes to produce the best output for the paper being used.
  6. The sensing process may add up to five seconds to the print process.
Manually selecting the paper type
The Automatic Paper-Type sensor may be disabled and the driver made to recognize manual selection of paper type. Manually selecting the paper type eliminates the time the printer needs to identify the paper. For instance, if a photo paper will be used a number of times in a row, consider selecting photo paper in the driver to save time. To manually select the paper type, do the following:
  1. For Windows 95, 98, Me, NT 4.0, and 2000, click Start, then click Settings, and then click Printers. For Microsoft (R) Windows XP, click Start, then click Control Panel, and then click Printers and Faxes.
  2. Right-click the Printer icon.
  3. For Windows 95, Windows 98, and Windows Me, click Properties. For Windows NT 4.0 and Windows 2000, click Printing Preferences. For Windows XP, click Document Defaults.
  4. Click the Setup tab.
  5. Click the Arrow in the Paper Type field and select the appropriate paper type.
  6. Click OK to save the settings and close the window.
Setting the paper type in this manner will change the default selection. Take care to reset the paper type, or set it back to Automatic, when using other papers.
Print quality and speed issues related to the Automatic Paper-Type sensor
  note:
Slow printing or poor print quality can be caused by factors other than the Automatic Paper-Type sensor. See the document BPD50035, titled "Commercial Inkjet Printers - Slow Printing, Banding, Or Erratic Behavior Of Operating System" for additional information.
Symptom
Cause
Fix or Workaround
The printer is very slow when printing on plain paper.
The Automatic Paper-Type sensor may have detected the incorrect paper type. It may be printing in Photo Paper mode on plain paper, which would slow it down.
Manually set the paper type by following the instructions above.
A document was printed with the Automatic Paper-Type sensor enabled. It looks different than when the same document was printed previously with the Automatic Paper-Type sensor enabled.
The particular paper may be not be identified properly by the Automatic Paper-Type sensor.
Manually select a paper type and select the desired print quality. For best performance, use HP brand papers.
With the Automatic Paper-Type sensor enabled, the print quality was not as good as expected.
The paper may be marked, scratched or wrinkled.
The Automatic Paper-Type sensor is less accurate if the paper is damaged. Make sure the paper is free of scratches and other damage.
The paper may be a letterhead or stationery with a preprinted pattern at the top edge.
The Automatic Paper-Type sensor always sets this type of letterhead or stationary to plain paper. Manually select the appropriate paper type. See the instructions above.
The paper may be dark in color or contain metallic fibers.
The Automatic Paper-Type sensor may set this type of paper to Plain Paper. Manually select the correct paper type. See the instructions above.
When printing with the Automatic Paper-Type sensor, the printer ejects the paper without printing on it.
The printer may have been placed in direct sunlight, overwhelming the Automatic Paper-Type sensor.
Move the printer out of direct sunlight.

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