MUHWA 10-Meter Alcohol Lamp Replacement Wick — Hollow 8-Strand Cotton Thread, 6mm Diameter, Bulk Roll
MUHWA 10-meter bulk roll of alcohol lamp wick provides a continuous, economical supply of replacement wick cord for laboratory alcohol lamps, spirit burners, and oil lamps. The wick is manufactured from 100% natural cotton in a hollow 8-strand braided construction — the hollow core enhances capillary action, drawing fuel efficiently from the lamp reservoir to the flame tip for a stable, consistent burn. At 6 mm diameter, this wick fits the vast majority of standard laboratory alcohol lamps used in microbiology, chemistry, and teaching laboratories worldwide. The 10-meter roll can be cut to any desired length, accommodating lamps of all sizes from compact 50 mL desk lamps to large 500 mL bench lamps. Keep a roll in your lab supply cabinet and never run out of wicks during critical sterilization workflows, practical examinations, or research protocols.
Key Features
- 10-Meter Continuous Roll — One roll provides enough wick cord for 20–50 individual lamp replacements (depending on lamp size). Stock once and cover your lab's wick needs for months or years.
- Hollow 8-Strand Braided Cotton — The hollow core construction dramatically improves capillary fuel draw compared to solid-braided wicks. Fuel wicks upward through both the hollow center channel and the cotton fiber capillary network, delivering a more robust, stable flame.
- 6 mm Standard Laboratory Diameter — Universally compatible with standard alcohol lamp wick tubes. Fits MUHWA alcohol lamps and most major laboratory equipment brands (Fisher, VWR, Thomas Scientific, etc.).
- 100% Natural Cotton Fiber — Clean-burning with no synthetic binders, coatings, or chemical treatments. Produces minimal soot when used with ethanol fuel; does not release toxic fumes during combustion.
- Cut-to-Length Customization — Cut precisely the length you need for each lamp — no waste from pre-cut wicks that are too short or too long. One roll services lamps of every size in your laboratory.
- Consistent Wick Quality — Uniform braiding tension and cotton quality across the entire 10-meter roll ensures every replacement wick performs identically — no variation in flame height or fuel consumption between wicks.
- Economical Bulk Format — Per-meter cost is a fraction of individually packaged pre-cut wicks. Ideal for multi-station teaching labs, hospital microbiology departments, and research labs with multiple alcohol lamps in daily use.
Technical Specifications
| Parameter | Specification |
|---|
| Length | 10 meters (continuous roll) |
| Diameter | 6 mm |
| Material | 100% natural cotton |
| Construction | Hollow-core 8-strand braided |
| Fuel Compatibility | Ethanol, methanol, isopropanol, denatured alcohol, lamp oil/paraffin |
| Flame Characteristics | Stable, clean-burning (minimal soot with ethanol) |
| Packaging | Bulk roll (non-sterile) |
How to Cut and Install
- Measure Required Length — Measure the wick tube depth plus desired exposed length (typically 2–3 cm above the tube for trim-to-fit). Add 5–8 cm for reservoir submersion. Typical total: 15–25 cm per lamp.
- Cut Cleanly — Use sharp scissors to cut the wick at a 90° angle. Avoid frayed or angled cuts that cause uneven burning. If the cut end frays, twist the cotton fibers together gently before threading.
- Thread Through Wick Tube — If the wick tube is empty, insert from the top and push through until the wick emerges from the bottom of the tube into the fuel reservoir. A thin wire or straightened paperclip can help guide the wick through narrow or curved tubes.
- Trim Tip — Once installed, fill the reservoir with fuel and allow 2–3 minutes for full saturation. Trim the exposed wick tip to approximately 5–8 mm above the tube opening. A slightly domed or pointed tip (cut at a shallow angle) produces a more focused flame.
- Test Burn — Ignite and observe for 30 seconds. A well-installed wick produces a steady, non-flickering flame with a blue base and yellow tip. If the flame sputters or smokes, check fuel level and wick saturation.
- Replacement Schedule — Replace the wick when the exposed tip becomes charred, brittle, or fails to draw fuel (flame weakens or extinguishes). With intermittent daily use, a wick typically lasts 1–2 months. Heavy continuous use may require replacement every 1–2 weeks.
Compatible Lamp Types
- Standard Glass Alcohol Lamps — 50 mL to 500 mL capacity, cotton-wick design, with 6 mm wick tubes. The most common laboratory lamp type.
- Brass and Copper Spirit Lamps — Traditional metal spirit burners with screw-cap wick assemblies. Verify wick tube diameter; most are 6 mm.
- MUHWA Alcohol Lamps — All MUHWA-brand alcohol lamps use 6 mm wicks (verify specific model).
- Teaching Laboratory Lamps — Student-grade alcohol lamps used in biology, microbiology, and chemistry practical sessions.
- Oil Lamps (Paraffin/Kerosene) — Wicks function in oil-fueled lamps, though oil produces more soot and requires more frequent wick trimming.
Applications
- Microbiology Inoculation Loop Sterilization — The primary use case. Maintain a clean alcohol flame for sterilizing platinum, nichrome, or disposable inoculation loops between bacterial transfers. Essential for aseptic technique in labs without Bunsen burner gas lines.
- Slide Heat-Fixing — Gentle alcohol flame for heat-fixing bacterial smears to microscope slides prior to Gram staining, acid-fast staining, and other differential staining protocols.
- Chemistry Demonstrations — Flame tests for metal cation identification (sodium = yellow, potassium = lilac, copper = green, strontium = red, barium = pale green). Alcohol flame provides clean background for color observation.
- Glass Working and Capillary Tube Pulling — Soften glass tubing and Pasteur pipettes for bending, sealing, or pulling into capillary tubes. Alcohol flame provides adequate heat for small-diameter borosilicate glass.
- Field Biology and Mobile Labs — Portable flame source for field microbiology, water quality testing, and environmental sampling where compressed gas cylinders are unavailable or impractical.
- Science Education (K-12 through University) — Safe, visible flame for teaching aseptic technique, sterilization principles, and basic lab skills. Alcohol flames are cooler and more visible than gas flames, reducing burn risk and improving student visibility.
- Artisan and Craft Applications — Small-scale annealing of non-ferrous metals, glass bead making, wax carving, and jewelry fabrication in studios and workshops.
Wick Troubleshooting Guide
| Problem | Likely Cause | Solution |
|---|
| Flame is weak, small, or sputters | Fuel level too low; wick not saturated | Refill reservoir; allow 3–5 min for full wick saturation |
| Flame produces black smoke/soot | Wick too long; impure fuel; low oxygen | Trim wick to 5–8 mm; use pure ethanol; ensure adequate ventilation |
| Wick chars quickly, burns down fast | Wick exposed too far above tube; fuel contains water | Reduce exposed length; use anhydrous or 95% ethanol |
| Fuel won't draw up the wick | Clogged wick with carbonized residue; hollow core collapsed | Cut fresh wick section; ensure hollow core is open at both ends |
| Uneven flame (one-sided) | Asymmetric wick cut; frayed fibers on one side | Recut wick tip cleanly at 90° with sharp scissors |
Frequently Asked Questions
Q: What fuel should I use for the cleanest flame?
A: Denatured ethanol (ethyl alcohol, 90–95%) provides the cleanest, most visible flame with minimal soot. Isopropanol (70–99%) also works but produces a less visible flame — useful for applications where flame visibility is not critical. Methanol burns very cleanly but the flame is nearly invisible in bright light and the fuel is more toxic — not recommended for teaching labs. Never use gasoline, acetone, or other highly volatile fuels — explosion hazard.
Q: How do I store the unused wick roll?
A: Store the roll in a cool, dry place away from direct sunlight, open flames, and chemical vapors. Keep the roll in its original packaging or a sealed plastic bag to prevent dust accumulation. Cotton wick has an essentially unlimited shelf life under proper storage conditions — it does not degrade or lose capillary performance over time.
Q: Does this wick contain any synthetic fibers or chemical treatments?
A: No. This is 100% natural cotton with no synthetic fiber blends, no flame-retardant treatments, no wax coatings, and no chemical sizing. It burns as pure cellulose, producing only CO₂ and H₂O as combustion products (plus trace soot if oxygen is limited). This is important for laboratories where chemical contamination of the flame environment must be avoided.
Q: What's the difference between this bulk roll and pre-cut wicks?
A: This 10-meter roll offers maximum flexibility and economy — cut to your exact length requirements for lamps of any size. Pre-cut wicks (also available) come in fixed lengths for common lamp sizes and are more convenient if all your lamps are identical. The roll is ideal for labs with mixed lamp sizes or those wanting to minimize cost per replacement.
Q: Can this wick be used with a ceramic wick holder?
A: Yes. If your alcohol lamp uses a ceramic wick holder, thread the wick through the holder's center hole before inserting the assembly into the wick tube. The 6 mm diameter fits standard ceramic holders. For pre-assembled wick + ceramic holder units, see our 10-pack Wick Set with Ceramic Holder (sold separately).
