SewGlo™ · Sewing Integration
SewGlo™
Sewing Guide
Machine settings, tension specifications, stitch technique, fabric compatibility, and hand stitching guidance for SewGlo™ Illuminated Thread. Covers all three variants and all sewing methods from hand stitching through industrial production.
Getting Started
Sewing Method and Variant Selection
Choose your sewing method based on the scale of your project and the thread variant based on the machine type and required tensile strength. All three variants can be hand stitched. Machine sewing depends on the variant.
Any Variant
Hand Sewing
All three SewGlo™ variants can be hand stitched exactly like standard thread. No machine required. Use a standard needle appropriate for the fabric. The only constraint is the same as all SewGlo™ methods: the needle must not pierce the thread itself.
SewGlo™ HD — Recommended
Home and Commercial Machine
SewGlo™ HD is the recommended sewing thread variant for all machine sewing. At 0.48mm and 60N break strength, it handles the tension demands of commercial and industrial sewing equipment. LT can be used on home machines at reduced tension but is not recommended for industrial use.
SewGlo™ HD / XR
Industrial Sewing
Industrial sewing machines operating at full production speed and tension require HD or XR. LT will snap under the tension discs of an industrial machine at working speed. XR adds an aramid core for load-bearing seam applications and is currently in pre-production.
Hand Stitching
Hand Sewing with SewGlo™
Hand sewing is the most accessible way to work with SewGlo™ and requires no special equipment. All three variants are suitable. The technique is nearly identical to working with standard thread.
Needle selection
Use a standard embroidery needle with an eye large enough to pass SewGlo™ through without binding. A #20 to #22 chenille needle works well for most hand sewing applications. The needle size should be appropriate for the fabric being worked.
Stitching technique
Hand stitch exactly like standard thread using running stitch, backstitch, or whip stitch depending on your pattern. The only constraint is that the needle must not pierce the SewGlo™ fiber itself on any pass. Travel through the fabric alongside the thread, not through it.
Run length
Keep individual continuous hand-stitched runs under 10m for uniform brightness from end to end. For designs requiring more coverage, use multiple segments each with its own power connection. Longer single runs will exhibit noticeable brightness drop-off toward the far end from the power connection.
Finishing and securing
Do not tie off SewGlo™ with a knot at the end of a run in the conventional thread sense. Instead, leave 10 to 20cm of tail at both ends. The start tail is for the power connection. The far end tail can be terminated with waterproof adhesive after trimming to the minimum needed to seal the cut end.
LT for hand sewing fine detail: SewGlo™ LT at 0.30mm produces the finest, most detailed hand-sewn patterns. Its flexibility makes it particularly easy to work with by hand. For finer fabrics like silk, chiffon, or mesh, LT is the right choice as HD's added stiffness can affect drape in lightweight materials.
Configuration
Sewing Machine Settings
Settings below apply to SewGlo™ HD on an industrial sewing machine. Values were measured on soft woven fabric. Adjust for your specific machine manufacturer and fabric substrate.
01
Needle Type
#140/22 or larger. Use a slant hole needle for leather applications on industrial machines.
02
Tension
Set as low as possible. Measured values: 3.5 (still/stopped state), 0.5 (active sewing). Always start at minimum and increase only as needed.
03
Speed
Low to medium. For leather on an industrial machine, run in first gear. High-speed passes increase thread tension and can cause breakage at the tension discs.
04
Automatic Cutting
OFF. Manual cutting required to leave 10 to 20cm of tail at each connection end for power lead attachment.
Rewinding for production volume: SewGlo™ HD can be rewound onto standard sewing cones for use on industrial or production-volume sewing equipment with no modification to the thread. Maintain the same tension and speed settings on the rewound cone.
Tension Reference
Tension Settings
Tension should be adjusted based on fabric texture and density. Values below were measured on soft woven fabric using an industrial sewing machine tension gauge. Heavier fabrics typically require slightly higher tension; lighter fabrics require less.
| State | Tension Value | Notes |
|---|---|---|
| Still state (not sewing) | 3.5 | Machine at rest with SewGlo™ HD threaded |
| Active sewing state | 0.5 | Measured during actual stitch pass on soft woven fabric |
When pulling the thread manually, it should move smoothly with low resistance. The back side of the seam should display: upper thread (2 passes) over bottom thread (1 pass). If the seam back shows a different ratio, tension is incorrect.
Tension check method: Before running a full production pass, test tension on a scrap of the same fabric. Power the connected test piece after stitching to confirm the thread is not shorted. Adjust tension until you achieve consistent stitch formation with no breakage and no visible thread deformation.
Technique
Recommended Stitch Type
Zigzag stitch is the recommended stitch type for machine sewing with SewGlo™. It secures the thread to the fabric surface without requiring the needle to pierce through the fiber itself.
Zigzag Stitch (Recommended)
Zigzag stitch is the most reliable approach for machine sewing with SewGlo™. The needle passes on alternating sides of the thread, securing it to the fabric surface without ever passing through the conductor. This avoids short circuits and produces a consistently lit result. Use this for nearly all sewing machine applications.
Straight Stitch (Use with Caution)
A straight stitch can be used in some applications but carries a higher risk of the needle piercing the fiber if the thread is not perfectly positioned. If using a straight stitch, test each run with power immediately after stitching to confirm no short was created before continuing.
Cording Technique
For both sewing and embroidery, cording places the SewGlo™ thread on the surface of the fabric and overstitches it using a standard thread. The SewGlo™ fiber never passes through the fabric itself. This is the highest-reliability technique for avoiding shorts and works on any fabric that can be machine stitched.
Substrate Compatibility
Fabric and Bottom Yarn
Recommended Fabrics
TPU film, woven fabrics, and artificial leather are all compatible. Artificial leather is easier to work with than natural leather on machines because its consistent density allows more predictable tension settings.
For natural leather: use SewGlo™ HD rather than LT. The higher tensile strength of HD handles the pull of dense leather materials. For very dense or hard leathers, pre-stitching with standard thread first, then removing it and sewing with SewGlo™ following the established path, can significantly reduce breakage risk.
Bottom Yarn
Use standard cotton or polyester bottom thread. Match the bottom yarn fineness to SewGlo™ HD at approximately 0.4mm for best stitch balance and thread visibility from the face side of the seam.
A bottom thread that is significantly heavier than the SewGlo™ fiber will pull the upper thread through the fabric, reducing the visible glow on the face side. A bottom thread that is too fine may produce uneven tension.
| Fabric Type | Compatible Variants | Special Notes |
|---|---|---|
| TPU film | LT, HD, XR | Good compatibility; use zigzag stitch for best adhesion |
| Woven fabrics | LT, HD, XR | Most common substrate; standard settings apply |
| Artificial leather | LT, HD, XR | Good results; run at low speed on industrial machines |
| Natural leather (soft) | HD, XR preferred | Use HD or XR; consider pre-stitching method |
| Natural leather (hard/dense) | HD, XR only | Pre-stitch path with standard thread first; first gear only |
| Knits and stretch fabrics | LT, HD | Allow slight slack in stitch to accommodate fabric stretch |
Critical Requirements
Critical Notes
These constraints apply to all SewGlo™ variants in all sewing applications. The most common failure mode in new SewGlo™ production setups is a needle piercing the fiber.
!
Never let the needle pierce the SewGlo™ fiber
A needle passing through the conductor creates a short circuit at that point. The thread will not illuminate from the connection to the short. The needle should travel alongside the fiber, not through it. Zigzag stitch and cording technique both accomplish this. Inspect each test piece with power applied before committing to a production run.
!
Keep each continuous segment under 10m
Single continuous thread runs under 10m produce uniform luminance end to end. Parallel connections (each segment within 10m) are suitable for complex patterns requiring multiple passes or wider coverage. Longer single-segment runs result in visible brightness drop-off toward the far end.
!
Leave 10 to 20cm of tail at each connection end
Do not trim flush. The exposed tail is needed to strip back the outer sheath and attach the power lead. Disable automatic thread cutting in machine settings to prevent the machine from trimming the connection tail during the run.
✓
Thread can be rewound for production volume
SewGlo™ HD and XR can be rewound onto standard sewing cones for use on industrial or production-volume sewing equipment. This allows integration into existing sewing infrastructure without modifying the thread or machine setup.
Power Connection
Connecting SewGlo™ to Power
For step-by-step connection instructions covering lead preparation, conductor separation, soldering, and insulation, see the SewGlo™ Connection Guide. A brief overview is below.
01
Strip the outer sheath with IPA
Soak 25 to 50mm of the thread tail in 90%+ isopropyl alcohol for 30 seconds. Massage the outer sheath off toward the tip. This exposes the two internal conductors cleanly without heat.
02
Separate and identify the conductors
Gently twist counterclockwise to separate the two conductors. The larger phosphor-coated conductor is the core (positive/main power). The fine fibrous conductor is the return ground lead.
03
Solder to power lead
Solder the phosphor-coated core to the main power lead. Attach the fine fibrous conductor to the return lead with conductive adhesive or solder. Keep the connection compact for wearable applications.
04
Insulate and test
Insulate all exposed connections with heat shrink tubing before wearing or testing. Power on the thread to confirm the connection is working before completing the garment or product. Heat shrink tubing is the preferred insulation method for production environments.
SewGlo™ Guides
Machine Settings · SewGlo™ LT
SewGlo™ Embroidery Guide
Machine settings, stitch spacing, and tension for embroidery.
Technical Reference
Technical Specification
Full specs for all three SewGlo™ variants.
Durability Data
SewGlo™ Testing Data
Heat, abrasion, wash, and automotive qualification results.
Overview
SewGlo™ Info Sheet
Variant comparison, wiring diagrams, and FAQ.
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