1. Introduction
Thank you for choosing NineLeaf compatible label tape. This manual provides essential information for the proper installation and use of your MK521 M-K521 Black on Blue 3/8" (9mm) x 26.2ft (8m) label tape. This non-laminated tape is designed for indoor applications and offers reliable labeling solutions for various environments.
2. Product Features
- Color & Size: Black print on blue tape, 3/8 inch (9mm) width, 26.2 feet (8m) length.
- Durability: Highly resistant to UV fading, ensuring labels remain visible over time.
- Adhesion: Features a quality permanent adhesive for strong adhesion to various surfaces.
- Residue-Free Removal: Designed to leave no sticky residue when labels are removed.
- Easy Peel: Split-back design for effortless peeling of the backing.
- Resistance: Water-resistant, abrasion-resistant, and anti-fade properties.

Image: Visual representation of the label tape's key features including easy peeling, water resistance, abrasion resistance, and strong adhesion.

Image: An infographic highlighting the tape's resistance to fade, temperature, chemicals, water, and abrasion, along with its easy-peel and strong adhesion properties.
3. Compatibility
NineLeaf MK521 M-K521 label tape is 100% compatible with a wide range of Brother P-touch M label makers, including but not limited to:
- PT100, PT110
- PT55BM, PT55S
- PT65, PT65SB, PT65SCCP, PT65SL, PT65VP
- PT70, PT70BBVP, PT70BM, PT70BMH, PT70HK, PT70HOL, PT70HOT, PT70SP, PT70SR
- PT80, PT80SCCP, PT85, PT90, PT-M95

Image: A collage of compatible Brother P-touch label makers, demonstrating the tape's broad compatibility.

Image: A close-up of the label tape cartridge being inserted into a P-touch label maker, emphasizing its perfect fit and compatibility.
4. Installation
- Ensure your label maker is turned off.
- Open the tape cassette cover on your Brother P-touch label maker.
- Insert the NineLeaf MK521 M-K521 label tape cartridge into the designated slot, ensuring it clicks firmly into place. Make sure the tape end extends slightly from the outlet.
- Close the tape cassette cover.
- You are now ready to print.
Video: This video demonstrates the simple process of installing the NineLeaf M Tape cartridge into a compatible Brother P-touch label maker.
5. Usage and Applications
This label tape is versatile and suitable for various indoor labeling needs:
- Home Organization: Labeling pantry items, storage bins, spice jars, and personal belongings.
- Office Efficiency: Organizing files, folders, shelves, cabinets, and office supplies.
- School & Education: Labeling books, school supplies, and classroom materials.
- Other Uses: Suitable for labs and hospitals for clear identification.

Image: Examples of label tape use in an office setting, including organizing files and storage.

Image: Examples of label tape use in a home setting, such as labeling food storage and plants.
6. Maintenance
To ensure optimal performance and longevity of your label tape and label maker:
- Store unused tape cartridges in a cool, dry place away from direct sunlight.
- Avoid exposing the tape to extreme temperatures or humidity.
- Keep the label maker's print head clean according to its manufacturer's instructions to prevent print quality issues.
7. Troubleshooting
If you encounter issues with printing or tape feeding:
- Poor Print Quality: Ensure the tape cartridge is correctly installed. Clean the print head of your label maker.
- Tape Jamming: Verify that the tape is properly threaded through the guides in the cartridge and the label maker. Remove and reinsert the cartridge.
- Tape Not Feeding: Check if the tape is stuck or if there's any debris obstructing the feed path. Ensure the tape is not too loose or too tight within the cartridge.
8. Specifications
| Brand | NineLeaf |
| Model Number | MK521, M-K521 |
| Color | Black on Blue |
| Size | 3/8" (9 mm) x 26.2 ft (8 m) |
| Material Type | Plastic |
| Finish Type | Non-laminated |
9. Warranty and Support
For any questions, concerns, or support regarding your NineLeaf label tape, please contact our customer service. We are committed to providing high-quality products and excellent support.