01 ALUMINIUM FOIL SURFACE ACCEPTANCE
Aluminium foil pinholes, wettability and surface cleanliness: write the acceptance basis
“No pinholes” and “clean surface” are not complete purchase requirements. First identify the exact plain, coated or converted foil and working side. Then attach each pinhole, wetting or visual-surface result to a current method, inspected sample, reporting basis and agreed disposition.
02 DECISION FRAME
A surface result becomes useful only when its scope and decision rule travel with it
ASTM B926 and GB/T 22638.2 provide pinhole-method contexts for aluminium foil, while GB/T 22638.4 addresses surface wetting tension. ISO 8296 states that wetting tension is not by itself a complete measure of ink, coating or adhesive adhesion. EAFA supplies a shared vocabulary for visual foil characteristics but says that vocabulary does not replace supplier-customer quality agreements. These sources help structure the RFQ; none creates a LayerSource acceptance value, supply claim or conversion guarantee.
- A converter comparing foil pinhole reports that use different methods, sample areas or reporting bases
- A printing, coating or laminating project that needs the correct foil side and surface state identified
- A receiving specification that currently says only “clean” or “no pinholes” without a sample and disposition rule
- That zero pinholes is a universal requirement for every foil thickness, construction or end use
- That a wetting-tension result can replace the agreed ink, coating or adhesive conversion trial
- That a visual inspection can report conditions outside its agreed visible-characteristic method or replace the conversion trial
03 COMPARISON MAP
Keep pinhole, wetting and visual-surface decisions separate
Each field answers a different question. Preserve the exact foil state, side, inspection scope and reporting basis before comparing supplier evidence.
Swipe or scroll horizontally to review every evidence column.
| Acceptance field | Question the RFQ must answer | Evidence to request | Do not infer |
|---|---|---|---|
| Foil identity and state | Is the specimen plain foil, or has it been coated, lacquered, printed, embossed or laminated? | Alloy, temper, thickness, surface state, Side A / B map and document revision | That a method for plain foil applies unchanged to a converted construction |
| Pinhole terminology | Which openings or light-table indications are included in the reported category? | Current method designation, agreed definitions, report categories and disposition rule | That every supplier uses “pinhole” and “roll hole” in the same way |
| Inspection scope | What material area, roll, lot and sampling locations does the result represent? | Specimen area, web locations, roll and lot identity, sampling plan and inspection date | That a count without its inspected area and lot scope is comparable |
| Pinhole report and limit | How is the observation reported and which buyer-owned rule controls acceptance? | Count or other agreed report form, measurement basis, acceptance owner and retest route | A universal maximum or a LayerSource default threshold |
| Surface wettability | Which side and foil state were tested, by what method and at what point in its history? | Method, side, unit, specimen state, test date, storage history and agreed limit | Completion of conversion validation for a different liquid system or surface state |
| Visual surface condition | Which visible characteristics are acceptable, rejectable or reference-only? | Agreed defect vocabulary, approved reference or master sample, location, extent and disposition | Conditions outside the agreed visible-characteristic method or readiness for conversion |
| Conversion validation | Does the identified foil work with the actual ink, coating, primer, adhesive and process? | Representative converter trial, cure or bond method, failure mode and finished-structure decision | That pinhole, wetting or visual inspection alone approves the converted laminate |
04 SELECTION SEQUENCE
Move from a broad comparison to an approvable decision.
Freeze the foil construction and working side
Record plain or converted state, alloy, temper, thickness and Side A / B before selecting a pinhole, wetting or visual-inspection basis.
Name the method, sample and report
Keep the current method designation, inspected area, roll and lot locations, reporting unit, acceptance owner and disposition rule together.
Close readiness with the real liquid system
Validate the intended ink, coating, primer or adhesive on a representative foil and report cure, retention, bond, failure mode and finished-structure outcome.
05 RFQ INPUTS
Aluminium foil pinhole, wettability and surface-acceptance RFQ checklist
Use these fields to replace broad surface language with a comparison and receiving basis the parties can review.
Open the RFQ brief builder ↗- 01
Packed product, complete laminate, foil layer role and downstream converting route
- 02
Alloy, temper, nominal thickness, surface state and controlled document revision
- 03
Plain, coated, lacquered, printed, embossed or laminated status before choosing a method
- 04
Side A / B map showing rolling, wetting-test, coating, print and lamination surfaces
- 05
Pinhole and roll-hole terms, current method, inspected area and report categories
- 06
Roll, lot, web-location, specimen, sampling and inspection-date traceability
- 07
Buyer-owned pinhole limit, reporting basis, acceptance owner, retest and disposition rule
- 08
Wettability method, side, unit, specimen state, test date, storage history and agreed limit
- 09
Visual-surface vocabulary, approved reference or master sample, extent and disposition
- 10
Ink, coating, primer or adhesive system plus representative conversion and bond validation
06 EVIDENCE BOUNDARY
Method scope and shared vocabulary do not create a universal foil limit
The official pages identify method scopes and a visual-surface vocabulary; this guide does not reproduce paid procedures, inspection thresholds or sampling plans. Confirm the current licensed document and its applicability to the exact plain or converted foil. Pinhole limits, wetting values, cleanliness evidence, sampling, retest and disposition remain buyer, converter and supplier agreement fields. No value or capability on this page describes a LayerSource-supplied grade.
07 BUYER QUESTIONS
Resolve the assumptions that make quotes diverge.
01Does a “zero pinholes” requirement work without a test method?+
Not as a comparable acceptance rule. Identify the exact foil state and thickness, current method, inspected area, roll and lot scope, category definitions, reporting basis, acceptance owner and disposition.
02Are pinholes and roll holes always reported as separate categories?+
Not automatically. ASTM B926 says its plain-foil scope identifies and counts pinholes, including roll holes. If the buyer needs separate categories or dispositions, write those definitions into the controlled agreement.
03Can aluminium-foil wettability replace a lamination or print trial?+
No. A wetting-tension method and a representative conversion trial answer different acceptance questions. Keep the wetting result attached to the exact side, surface state, method, date and storage history, then record the intended ink, coating, primer or adhesive trial separately.
04Can visually clean foil pass without a surface-quality agreement?+
Visual inspection needs agreed language, reference examples, location, extent and disposition. EAFA describes its catalogue as a common language for discussion, not a replacement for an individual quality agreement. A separately specified non-visual measurement needs its own applicable method and decision rule.
05Can a plain-foil method be applied to coated or laminated foil?+
Confirm scope before use. ASTM B926 is explicitly for plain foil, and DIN Media states that DIN EN 546-4 does not apply to lacquered, coloured, embossed or laminated products. Select or agree the method for the actual construction.