Selection
How do I choose a cleanroom wiper?
Start with four parameters, in this order: the surface being wiped, the solvent and its concentration, the cleanroom class, and the disposal route. Those four narrow the catalogue to two references — a primary and a qualified fallback. A photograph is not a specification. The full framework is here.
Which wiper should I use for ISO 5, ISO 7 and ISO 8?
Cut-edge wipes are the practical choice for ISO 7–8 utility work. Sealed-edge and low-particle references are specified for ISO 5–6, where fibre release is the limiting factor. Sterile references are packed for Grade A/B transfer. The class sets the edge and the documentation, not just the material. Wiper selection by class covers the boundaries.
Cut edge or sealed edge — does it really matter?
A cut edge sheds more than a sealed edge, and the difference is measurable. In ISO 7–8 utility wiping, a cut edge is usually acceptable. In ISO 5–6, or on a critical surface, the edge is often the deciding specification. Ultrasonic and laser sealing cost more per sheet; the test report is what justifies the difference. The edge decision explains where each finish belongs.
Should I use wiping cloths or wiping papers?
Cloth for solvent work, wet strength and reuse within a task. Paper for low-lint bench work, delicate instruments and controlled disposal. The four cases where paper wins are covered in wiping cloths versus wiping papers. Most sites hold both, because the tasks are different.
What does GSM mean, and is a heavier wipe always better?
GSM is the basis weight in grams per square metre. A heavier sheet holds more liquid and resists tearing, but it also takes longer to dry, costs more per piece and can leave more residue if the fibre blend is wrong. Match the weight to the task, not to the price list. The GSM and coverage guide shows the trade-off.
When should a wipe be pre-wetted?
Pre-wetted packs make sense when the solvent dose has to be repeatable, or when an operator cannot carry a spray bottle into the area. They also remove the risk of using the wrong dilution. If the process already controls solvent application, a dry wipe plus a validated spray is usually cheaper. Pre-wetted references are here.
Compliance & documentation
Are your wipes sterile? What does SAL 10⁻⁶ mean?
Only the references in the sterile range are sterile. They are triple-bagged, sterilised by EO or gamma, and released with a sterility assurance level of 10⁻⁶ — the probability of a viable microorganism on a unit is one in a million. The certificate travels with the lot. Sterile references and the Annex 1 note explain the barrier stack.
What is a certificate of analysis, and what should it contain?
A CoA records the lot, the reference, the measured results and the release signature. It should let you compare the lot against the specification without calling the supplier. A CoA that only repeats the marketing name is not a release document. How to read a CoA walks through the fields.
Which test methods are used for wiper performance?
Particle count, fibre release, extractables and sorption are measured with the relevant IEST-RP-CC004 methods. Not every reference needs every test; the test report states which methods were run and on which lot. The test-method note explains the numbers.
Can you support an audit or a supplier qualification?
Yes. Send the reference and the cleanroom class; the desk returns the current test report, the CoA template and the traceability path for a recent lot. The quality page lists the standard document pack. Quality & documentation has the detail.
Ordering & supply
What is the minimum order quantity?
Stock references start at one case. Sterile programmes and private-label runs are quoted per configuration because the pack format and release testing change with the run. Mixed pallets are possible for stock references.
What are the lead times?
Stock references are typically 12–18 days ex-works Shenzhen. Sterile lines run 21–30 days; private-label runs 25–35 days. The date is confirmed against the quantity and pack format, not assumed from the family average.
Do you offer private label or OEM?
Yes. Private-label runs use your artwork, pack count and release criteria, produced on the same lines as the stock programme. The minimum run is 1,000 packs. The OEM cost note explains what drives the quotation.
Can you supply pre-wetted wipes at a specified IPA concentration?
Yes, where the format supports it. The common specification is 70% IPA / 30% DI water, but the concentration, pouch size and pack count are confirmed against the reference. Solvent compatibility with the wipe material is checked before the quote. 70% versus 99% IPA is the starting point.
How do I request samples, and do you ship internationally?
Send the application, the solvent, the cleanroom class and the delivery country through the contact form. Stock references ship as sample packs; sterile references follow the production schedule. International shipments are quoted with the Incoterm and the destination clearly stated.
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