Unitek CRP0760-6 Clean-Write® 22 lb Cleanroom Paper — 11" x 17", Loose Sheets (250/ream, 5 reams/case)
CRP0760-6 is medium-weight, latex-saturated cellulose cleanroom paper for controlled-environment documentation that needs a larger format: equipment layouts, process maps, batch packet inserts, drawing markups, inspection checklists, and printouts that you do not want on office-grade paper. Unitek Clean-Write Paper is cleanroom packaged and produced to substantially reduce particle generation associated with standard papers, while remaining compatible with laser, inkjet, and toner-based printers for practical day-to-day use.
This format is especially useful when teams are standardizing paper flow inside ISO-controlled areas: it supports legible, auditable records without importing uncontrolled fibers, inks, and paper dust from general office stock.
Published configuration (CRP0760-6)
- SKU: CRP0760-6
- Sheet size: 11" x 17"
- Paper weight class: Sub 22.5 (as published in technical data sheet)
- Construction: Cellulose base paper saturated with synthetic latex (manufactured with cellulose base paper and synthetic latex)
- Packaging (SOSCleanroom case option): 5 packs per case (250 sheets per pack)
- Packaging (manufacturer): 11" x 17" — 5 reams/case; 250 sheets/ream
- Color options on SOSCleanroom: Blue, White
- Cleanroom packaging: Cleanroom packaged (as published)
- Printer compatibility: Compatible with all laser, inkjet, and toner-based printers (as published)
- Handling/performance notes: Tear resistant and durable; smear resistant; designed to substantially reduce particle generation associated with standard papers (as published)
Low particle generation — and the reality check
This paper is produced to substantially reduce particle generation versus standard papers, supporting controlled documentation inside critical environments. Even so, no paper product is truly zero-shedding in real operations. Treat loose sheets like contamination-controlled components: control how they are introduced, how they are staged, and how they are handled at the bench.
Practical cleanroom use guidance (technicians and engineers)
- Introduce only what you need: Bring in the minimum number of sheets required for the task to reduce open-stack exposure and particle mobilization.
- Stack discipline: Keep sheets aligned and flat; avoid fanning, tapping edges on benches, or rapid flipping near open product.
- Glove control: Keep gloves dry. Wet gloves (solvent or DI) are a primary driver of smearing, transfer, and sheet-edge deformation.
- Segregate the work zone: Keep paperwork out of critical surface areas; use a designated documentation zone or clipboard/binder station when possible.
- Print control: If printing inside controlled areas, qualify the printer and consumables to prevent toner/ink particulate issues and uncontrolled residues.
Compatibility and wipe-down notes
- Solvent contact: The paper is listed as smear resistant, and typical non-volatile residue (NVR) values are published for DI water, isopropyl alcohol, and Freon TF. Wipe-down tolerance for loose sheets is not published; qualify under your site chemicals, dwell times, and handling rules before standardizing.
- DI water / aqueous exposure: Typical NVR in deionized water is published; practical wipe-down tolerance is not stated. If your process requires aqueous contact, validate for swelling, wicking, and legibility impacts.
- Handling technique: Keep solvents away from sheet edges and corners to reduce edge wicking and paper dusting from softened fibers.
Typical performance characteristics
These are published as typical analyses (not specifications) to support qualification planning and contamination-risk reviews.
| Property |
Typical value |
Test method (as published) |
| Basis weight |
Sub 22.5; 51.0 (unit not stated in published table) |
Not stated |
| Caliper |
4.7 mil |
Not stated |
| Tear strength |
MD 105 g; CD 95 g |
Not stated |
| Tensile strength |
MD 36 #/in; CD 32 #/in |
Not stated |
| Elongation |
MD 3%; CD 8% |
Not stated |
| Mullen burst |
50 psi |
Not stated |
| Internal bond |
13 oz/in |
Not stated |
| Porosity |
5 seconds |
Not stated |
Typical contamination characteristics
These are published as typical analyses (not specifications) to support qualification planning and contamination-risk reviews.
| Property |
Typical value |
Test method (as published) |
| Extractible ions in deionized water (ppm) — Chloride |
142.0 ppm |
Not stated |
| Extractible ions in deionized water (ppm) — Potassium |
60.3 ppm |
Not stated |
| Extractible ions in deionized water (ppm) — Sodium |
284.0 ppm |
Not stated |
| Non-volatile residue (g/m²) — Deionized water |
0.31 g/m² |
Not stated |
| Non-volatile residue (g/m²) — Isopropyl alcohol |
0.63 g/m² |
Not stated |
| Non-volatile residue (g/m²) — Freon TF |
0.32 g/m² |
Not stated |
| Dry particle generation (≥ 0.5 µm) |
Helme Drum Test (ft³) 24,772 |
IES-RP-CC-003-87T (as listed with Helme Drum Test) |
Common failure modes
- Smearing / transfer: Common when sheets are handled with wet gloves or contacted with solvent before inks are fully dry. Prevent with dry-glove discipline and controlled dry time.
- Paper dusting at edges: Driven by fanning, tapping edges, or aggressive handling. Prevent with stack discipline and minimizing sheet movement near open product.
- Residue carryover: Transfer from benches, sleeves, or contaminated gloves. Prevent by using a designated documentation zone and keeping sheets off process-contact surfaces.
- Printer-related contamination: Unqualified printers/toners can introduce particulates or residues. Prevent by qualifying printer hardware/consumables for controlled-environment use when printing inside clean areas.
- Static attraction: In low humidity, loose sheets can attract fines. Prevent by following site ESD controls and avoiding rubbing sheets against garments or plastic sleeves.
Storage and handling best practices
- Keep paper in original cleanroom packaging until introduced into the controlled area.
- Store flat, covered, and closed to reduce particulate deposition and edge wear.
- Avoid staging near spray-and-wipe activities; keep sheets away from wet chemical zones to reduce wicking and residue.
- Use controlled transport (folder/binder/clipboard station) to prevent corner damage and debris generation during movement.
Documentation
Unitek / Total Source Manufacturing product page (Clean Room Paper — 8.5" x 11" and 11" x 17"):
Click HereManufacturer PDF (CLEAN-WRITE PAPER technical data sheet, CRP0760):
Click Here
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