01 FILM OPTICAL-DEFECT EVIDENCE
Plastic-film gels, fisheyes and black specks: define the optical-defect evidence before RFQ
Treat gel, fisheye, black-speck, hole and other defect labels as an agreed inspection taxonomy—not as interchangeable property values. A comparable RFQ fixes the film and specimen stage, observation route, optical system, detection and classification basis, inspected area or web coverage, report unit, lot and roll traceability, and buyer-owned disposition rule.
02 DECISION FRAME
A defect name is not yet a comparable inspection record
ASTM D7310-21 is the active practice for observing and reporting plastic-film defects with optical scanning systems. Its public significance text identifies comparison factors such as size classes, reported defect types, units, equipment, camera settings and extrusion parameters; it does not supply a universal gel definition or acceptance limit. ASTM D3351-93, the former projected-image gel-count method, was withdrawn in 2000 with no replacement. The RFQ must therefore name the current inspection route and preserve its complete reporting basis instead of citing a generic gel count.
- A film buyer comparing defect maps, class counts or inspection summaries from different suppliers or rolls
- A converter defining how visible gels, fisheyes, black specks or other local irregularities will be recorded before a trial
- A resin-to-film evaluation that must distinguish a laboratory-prepared film from the delivered commercial web
- That gel, fisheye, black speck, inclusion, hole, streak and surface mark are universal or interchangeable classes
- That haze, gloss, clarity, pinhole, barrier or surface-treatment data replaces a localized optical-defect record
- That an optical event count identifies chemical composition, root cause, application fitness or supplier capability
03 COMPARISON MAP
Keep the specimen, optical system, classification and report unit attached
Two reports are comparable only when their inspection object, acquisition basis, class definitions, coverage and output remain visible. The buyer and responsible laboratory own every acceptance decision.
Swipe or scroll horizontally to review every evidence column.
| Decision record | What must be identified | Evidence to retain | Invalid shortcut |
|---|---|---|---|
| Inspection object | Delivered film, trial web, retained roll sample or a film prepared from identified resin | Material or grade, construction, thickness, stage, batch, lot, roll and sample location | Transferring a laboratory-film result to every commercial roll |
| Observation route | Named visual screen, offline optical system, continuous web sensor or separately approved route | Method and edition, equipment, software, illumination and acquisition record | Treating unlike observation routes as numerically equivalent |
| Defect taxonomy | Controlled names, image examples, class boundaries and treatment of coincident or repeated events | Taxonomy revision, annotated images, reviewer and unresolved classifications | Assuming every supplier uses gel, fisheye or black speck in the same way |
| Optical configuration | Transmission or reflection basis, camera, resolution, sensitivity, grey level and relevant system settings as reported | Configuration export or report, calibration or verification status and change record | Comparing counts while hiding the detection configuration |
| Coverage and normalization | Inspected area, web width and length, sampling location, excluded zones and chosen report unit | Raw event map, size-class counts, normalized result, images and lot or roll traceability | Comparing a spot sample, continuous web and resin-mass basis as one population |
| Decision and follow-up | Buyer-owned limit, sampling plan, review owner, retest or disposition route and root-cause trigger | Controlled specification, decision record, retained evidence and approved change notification | Turning an optical count into automatic root cause, package approval or grade-wide release |
04 SELECTION SEQUENCE
Move from a broad comparison to an approvable decision.
Freeze the inspection object
Identify whether the evidence comes from a delivered roll, a converter trial, a retained specimen or film prepared from resin. Keep batch, lot, roll, web position, construction and thickness with the record.
Align taxonomy and reporting basis
Exchange the defect dictionary, image examples, optical-system record, size classes, inspected coverage and output unit before comparing two reports.
Route acceptance and root cause separately
Apply only the buyer's controlled specification and approved sampling or disposition rule. Send composition or cause questions into a separate analytical review rather than inferring them from the optical class.
05 RFQ INPUTS
Plastic-film optical-defect inspection RFQ checklist
Use exactly these fields to request comparable evidence. Unknown settings, classes and limits stay open for the buyer, supplier and responsible laboratory to resolve.
Open the RFQ brief builder ↗- 01
Packed product, converting route, film function and the decision the optical-defect record must support
- 02
Exact film or resin identity, grade or candidate code, layer construction and supplier identity if known
- 03
Specimen origin and stage: delivered roll, trial web, retained film or film prepared from identified resin
- 04
Batch, lot, roll, sample, web-position, date and chain-of-custody traceability
- 05
Observed concern or failure symptom, recorded without assigning an unverified root cause
- 06
Controlled defect taxonomy, image library or reference samples and their revision
- 07
Definitions for gel, fisheye, black speck, inclusion, hole, streak or other requested classes
- 08
Inspection route: named visual screen, offline optical system, continuous web sensor or another approved route
- 09
Named method and edition, licensed procedure owner and any approved deviation
- 10
Equipment make and model, camera or sensor, software and configuration revision
- 11
Transmission or reflection basis, illumination, resolution, sensitivity, grey level and other relevant acquisition settings as reported
- 12
Film thickness, width, colour or opacity, side or surface and other specimen features affecting observation
- 13
Conditioning, sample preparation or resin-to-film extrusion history exactly as reported by the responsible laboratory
- 14
Inspected area, web width and length, sampling locations, excluded zones, coverage basis and recorded scan or web speed
- 15
Size classes, defect-type classes, overlap rules and treatment of repeated or coincident events
- 16
Report unit, normalization basis, aggregation, raw count, class table, event map and representative images
- 17
Buyer-owned limit, sampling or AQL reference, uncertainty or review rule, retest path, disposition and decision owner
- 18
Application-correlation plan, converter-trial link, root-cause escalation, change-notification triggers and retained-record location
06 EVIDENCE BOUNDARY
ASTM D7310 structures optical reporting; it does not supply your pass/fail limit
ASTM D7310-21 is active and covers standardized approaches and criteria for optical-sensor observation and reporting of defects in plastic film, including laboratory, continuous quality-control and research contexts. Its public page lists size classes, defect types, report units, equipment, camera settings and extrusion parameters among comparison factors and says individual correlation is the aim for fitness-for-use. It does not define a universal defect threshold for this buyer. ASTM D3351-93 is withdrawn with no replacement and is retained only to prevent a legacy gel-count citation from being presented as current. ISO 23559:2011 is general guidance for selecting and characterizing thermoplastic-film tests, not a defect acceptance specification. OCS's FSP600 and Film Surface Analyser materials show one supplier's optical-system examples for gels, black specks, fisheyes and other irregularities; their categories and settings do not become universal definitions. Thermo Fisher's polymer-film Raman note supports keeping identification of an inclusion or defect source as a separate analytical question. This page reproduces no paid procedure and supplies no fixed illumination, resolution, sensitivity, speed, area, class boundary, gel count, defect limit, sampling plan, AQL, pass/fail rule or operating instruction. It establishes no LayerSource film, defect grade, gel result, inspection equipment, testing, laboratory, manufacturing, quality-control or supply capability. The buyer, supplier, converter and responsible laboratory must approve the current licensed method, taxonomy, settings, coverage, result unit, acceptance rule and any root-cause investigation for the exact specimen and application.
07 BUYER QUESTIONS
Resolve the assumptions that make quotes diverge.
01Does a haze or clarity result replace optical-defect inspection?+
No. Haze and clarity describe broader light-transmission effects under their own methods, while an optical-defect record classifies localized events under an identified system, taxonomy and coverage. Keep the results in separate rows.
02Is ASTM D3351 still a current gel-count method?+
No. ASTM lists D3351-93 as withdrawn in 2000 with no replacement. Preserve a legacy reference only as document history; select a current applicable route with the responsible laboratory rather than relabelling it as current.
03Are gels, fisheyes and black specks interchangeable defect names?+
No universal equivalence is assumed. Exchange the controlled taxonomy, image examples, class definitions and review rules used for the exact report, then resolve any unmatched term before comparison.
04Can two optical-system counts be compared directly?+
Only after the specimen, coverage, size classes, defect taxonomy, unit, equipment, camera or sensor, software and relevant acquisition settings are aligned or an approved correlation is documented. Similar labels alone are insufficient.
05Does an optical event identify its chemical composition or root cause?+
Not by itself. Preserve the event image and sample traceability, then use a separately approved analytical route when composition or cause must be investigated. Do not infer chemistry from the optical label.
06Which fields should remain open when no acceptance rule exists?+
Leave the taxonomy, inspection route, settings, coverage, report unit, sampling plan, limit, retest, disposition and correlation question unresolved. Assign the buyer, supplier or responsible laboratory as the decision owner instead of inventing a threshold.