This topic is about finding ways to dye Hollister ostomy bags black, making them less noticeable when they hang over a belt or are exposed at social events. The goal is to find a DIY method that works effectively without damaging the bag. Here are some ideas and tips shared by others:

1. **Reusable Cloth Covers**:
- Consider buying or sewing reusable cloth covers instead of altering the pouch itself.
- Short, snug covers that stop above the outlet can remain on while draining.
- You can add zip or Velcro openings. Many colors and designs are available on Amazon and Etsy.

2. **Pre-Colored Ostomy Bags**:
- Purchase pre-colored ostomy bags if available.
- Salts Healthcare in the UK offers black pouches, though they are not available in the U.S.

3. **Tape and Wrap Options**:
- Cover the bag with black electrical tape or patterned duct tape.
- Keep in mind that tape may stiffen the pouch and show through clothing.

4. **Painting Methods**:
- Spray paint, like Krylon Ultra Flat Black, is recommended for flexibility and no flaking, suitable for single events.
- You can add color or designs with glitter or "puff" fabric paint, but avoid puncturing the bag.

5. **Dyeing Tips**:
- Use Rit DyeMore for synthetic fabrics and plastics, keeping the water temperature below the pouch’s heat tolerance.
- Standard Rit dyes require a fixative to lock in color and prevent staining.
- Only dye the fabric face of the pouch to avoid skin irritation and damage to the adhesive area.

6. **Marker and Fabric-Paint Alternatives**:
- Permanent markers are not effective on Hollister plastic.
- Craft-store fabric paints offer washable color without needing a boil bath.

7. **General Cautions**:
- Be aware that any chemical (dye, paint, tape adhesive) might degrade the pouch material or irritate the skin. Test on one bag first and limit wear time.
- Clear Sensura Mio pouches are mentioned as good candidates for tape or paint since they lack a fabric front.

8. **Fun Extras**:
- Consider matching dyed pouches to neckties or outfits, which could become a niche business. Users already pay premium prices for accessories like the Stealth Belt.

These suggestions aim to help you personalize your ostomy bag while ensuring it remains functional and comfortable.