18" x 36" Tack Cloth “Unbleached” (Cheesecloth Fabric) — Medium/Heavy Tack, Bulk Packed (BWT)
BWT is an unbleached cheesecloth tack cloth used for dry surface prep where dust, fibers, and fine debris can create coating or bonding defects. Tack cloths are often used as a final pickup step in paint/coating workflows and general surface preparation. The tack formula is described as nonpetroleum based, and the product is listed as suitable for tacking metal and composite surfaces.
For technician practice, tack cloths work best with light contact and controlled passes: do not overwork the surface, and retire the cloth early once it begins to load. That handling discipline reduces streaking, tack transfer, and re-deposition risk.
Published configuration (BWT)
- SKU: BWT
- Available quantity option: Case
- Case unit: 3 bags of 100 cloths per case (300 cloths/case)
- Cloth size: 18" x 36"
- Tack level: Medium/Heavy tack formula
- Base fabric: Unbleached cheesecloth base fabric (100% cotton cheesecloth described as the common substrate)
- Count per bag: 100 precut tack cloths per bag
- Packaging: Bulk packed
- Intended surfaces (as stated): Suitable for tacking metal and composite surfaces
- Tack formula note (as stated): Tack formulas are nonpetroleum based
Low-linting intent — and the reality check
Tack cloths are selected to support controlled pickup with low-linting behavior versus general shop rags. Even so, no wipe is truly non-shedding under all conditions. Treat tack cloths as contamination-controlled tools: keep them sealed until use, minimize handling steps, and avoid aggressive rubbing that can increase fiber release or tack transfer.
Practical use guidance (technicians and engineers)
- Use as a final dry pickup step: Run the tack cloth after gross cleaning and dry-down to capture remaining fines. Do not use tack cloths to remove wet soils.
- Light contact, single-direction passes: Use minimal pressure and long, controlled strokes. Heavy pressure can increase streaking and tack transfer.
- Fold for control: Fold into a manageable pad so the working face stays flat and you can refold to a cleaner area as it loads.
- One cloth, one zone: Standardize a zone-based approach (one cloth per panel/section) to reduce re-deposition and finish variability.
- Edge and snag awareness: Cheesecloth can snag on sharp edges or burrs. If snagging occurs, retire the cloth and address the edge condition before continuing.
Compatibility and wipe-down notes
- Dry-use product: This tack cloth is described for tacking (dry pickup). Solvent compatibility (IPA, acetone, blends) is not published for BWT. If your process requires solvent contact, qualify for tack transfer, streaking, and residue under your exact chemistry and surface type.
- Aqueous exposure: Not published. Avoid wet use unless validated, since moisture can change pickup behavior and increase smear/transfer risk.
- Bonding/coating processes: The product description states that tacking to remove fibers, dust, particles, and other contaminants will not interfere with bonding or coating adhesion. In regulated or high-risk finishes, confirm by running a small qualification panel under your coating system and cure conditions.
- Sterility: Not stated. Do not assume sterile for aseptic programs.
Typical performance characteristics
Published quantitative performance metrics (e.g., tensile, absorbency, tack force, abrasion) are not provided on the SOSCleanroom product page for BWT. Use this section as a qualification checklist for your internal process validation.
| Property |
Typical value |
Test method (as published) |
| Tack performance (quantitative) |
Not published (listed as Medium/Heavy tack formula) |
Not stated |
| Tensile / tear strength |
Not published |
Not stated |
| Residue potential (quantitative) |
Not published |
Not stated |
Typical contamination characteristics
Published contamination metrics (particles, ionic extractables, NVR) are not provided on the SOSCleanroom product page for BWT. If contamination limits are program-critical, qualify using your site methods on representative cloths from the delivered lot.
| Property |
Typical value |
Test method (as published) |
| Particles / fibers |
Not published |
Not stated |
| Non-volatile residue (NVR) |
Not published |
Not stated |
| Ionic extractables |
Not published |
Not stated |
Common failure modes
- Streaking / smear marks: Often caused by too much pressure, repeated passes, or using a cloth after it has loaded. Prevent with light contact, single-direction passes, and early discard.
- Tack transfer / residue: Can occur when a cloth is overworked, warmed, or used on incompatible finishes. Prevent by validating on a non-critical area, controlling pressure, and avoiding extended dwell on the surface.
- Particle re-deposition: Triggered by reusing cloths beyond capacity or setting cloths down on dirty staging surfaces. Prevent with zone-based usage and clean staging practices.
- Fiber pull-out / snagging: Cheesecloth can snag on burrs and sharp edges, creating loose fibers. Prevent by deburring surfaces and folding the cloth into a controlled pad to reduce edge catch.
- Process interference from wet use: Introducing solvents or water can change tack behavior and increase transfer risk. Prevent by keeping tack cloth use dry unless your process validation explicitly allows wet contact.
Storage and handling best practices
- Keep bags sealed until point-of-use to minimize airborne loading and accidental contamination.
- Store in a clean, dry location away from heat and direct sunlight to reduce variability in tack behavior.
- Segregate tack cloth dispensing from wet cleaning chemistry to prevent accidental saturation.
- Standardize a discard rule (per panel/zone or timed interval) to prevent overuse and re-deposition.
Documentation
If your QA file requires a manufacturer datasheet or SDS for the tack formula, request the document set from SOSCleanroom so it matches the exact delivered configuration and packaging.
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