1. Product Overview
These ink cartridges are designed as compatible replacements for HP 680 and 680XL series. They are engineered to provide reliable printing performance for a range of HP Deskjet Inkjet printers. The cartridges feature an intelligent chip for compatibility and are designed to produce clear text and vibrant colors.
Each black ink cartridge yields approximately 750 pages, and each color ink cartridge yields approximately 450 pages, based on 5% coverage on A4 paper.
2. Printer Compatibility
These ink cartridges are compatible with the following HP Deskjet Inkjet Printer models:
- HP Deskjet Ink 1115, 1118
- HP Deskjet Ink 2135, 2136, 2138
- HP Deskjet Ink 26805, 26806, 26807, 26808
- HP Deskjet Ink 3635, 3636, 3638
- HP Deskjet Ink 3775, 3776, 3777, 3778, 3779, 3785, 3786, 3787
- HP Deskjet Ink 3835, 3836, 38381

Figure 2.1: List of compatible HP Deskjet printer models for the 680/680XL ink cartridges. Please verify your printer model before installation.
3. Installation Guide
Follow these steps to properly install the ink cartridge into your HP Deskjet printer:
- Ensure the printer is powered on.
- Open the front cover of the printer.
- Press the ink button on your printer to move the cartridge carriage to the replacement position.
- Open the upper cover of the ink cartridge slot.
- Carefully remove the old ink cartridge from its slot.
- Unpack the new ink cartridge and remove any protective tape or clips. Do not touch the copper contacts or ink nozzles.
- Insert the new cartridge into the correct slot (black for black, color for color) and push it down firmly until it clicks into place.
- Close the upper cover of the ink cartridge slot.
- Close the front cover of the printer.
- After completing the above steps, press the ink button on the printer again to confirm installation and allow the printer to initialize.

Figure 3.1: Example of a high-quality printout achieved with the ink cartridges.
4. Operating Instructions
Once the ink cartridges are installed, your printer is ready for use. Ensure your printer drivers are up to date for optimal performance.
- Printing Documents: Select your printer from the print dialog box in your application. Choose desired print settings (e.g., paper type, print quality) and click "Print".
- Monitoring Ink Levels: Most HP printers allow you to monitor ink levels through the printer software on your computer. Refer to your printer's specific manual for details on checking ink levels.

Figure 4.1: Examples of vibrant images and clear prints achievable with these cartridges.
5. Maintenance
Proper maintenance helps ensure the longevity of your ink cartridges and consistent print quality.
- Storage: Store unused ink cartridges in their original sealed packaging in a cool, dry place away from direct sunlight.
- Print Head Cleaning: If print quality degrades (e.g., streaks, faded colors), perform a print head cleaning cycle through your printer's utility software. Refer to your printer's manual for instructions.
- Regular Use: To prevent ink from drying out, it is recommended to print at least once a week.
6. Troubleshooting
Here are solutions to common issues you might encounter:
- "Non-Original Ink Cartridge" Message: If your printer displays a message like "Non-Original Ink Cartridge" or "Used/Refilled Cartridge," simply click "OK" or "Continue" on the printer's screen or computer prompt. This is a standard notification for compatible cartridges and will not prevent printing.
- Cartridge Not Recognized: If the printer does not recognize the ink cartridge after installation:
- Remove the ink cartridge.
- Turn off the printer and unplug it for a few minutes.
- Clean the copper contacts on the cartridge with a lint-free cloth.
- Reinstall the cartridge firmly into its slot.
- Turn the printer back on.
- If prompted, click "OK" or "Continue" repeatedly until the printer recognizes the cartridge and resumes normal operation.
- Poor Print Quality:
- Ensure the protective tape was fully removed from the cartridge.
- Perform a print head cleaning cycle through your printer's software.
- Check ink levels to ensure cartridges are not empty.

Figure 6.1: Comparison illustrating the print effect and clarity of these cartridges versus others.
7. Product Specifications
| Feature | Detail |
|---|---|
| Model | 680 / 680XL |
| Brand | Generic |
| Color | Black + Color (as a set) |
| Black Cartridge Page Yield | Up to 750 pages (5% coverage) |
| Color Cartridge Page Yield | Up to 450 pages (5% coverage) |
| Product Dimensions | 0.39 x 0.39 x 0.39 inches |
| Item Weight | 7 ounces |
| Manufacturer | RONGPXSM |
8. Support and Contact Information
For any questions or assistance regarding these ink cartridges, please contact customer support.
- Customer Service: If you have any questions, please send an email to the seller. They typically reply within 24 hours.
- Warranty: Specific warranty details may vary. Please refer to your purchase documentation or contact the seller for warranty information.





