{"id":"bbee3df1-d62e-456c-8c01-de3a862c28f4","task":"Preflight a large-format file against PDF/X-4 and the Ghent Workgroup Sign & Display specification before RIPing","domain":"gwg.org","steps":["Download the free GWG Sign & Display Preflight Profile and specification document from gwg.org","Determine the job's average viewing distance and any scaling factor, since the profile's resolution/quality checks scale with those inputs","Load the profile into a supporting preflight tool (callas pdfToolbox and Enfocus PitStop both publish compatible profiles)","Confirm the file meets base PDF/X-4 requirements (ICC-based output intent, embedded fonts, correct transparency handling) before applying sign-specific checks","Run preflight and resolve flagged issues (low-res images for the stated viewing distance, missing bleed, spot color mismatches) before sending to RIP"],"gotchas":["The correct profile variant depends on viewing distance/scale factor — using a generic commercial-print PDF/X-4 profile instead of the Sign & Display variant misjudges acceptable resolution","PDF/X-4 permits RGB/Lab color with live transparency; RIPs or workflows expecting flattened PDF/X-1a input can mishandle these files","The GWG specification is a voluntary industry guideline layered on top of the ISO PDF/X-4 standard, not an ISO standard itself"],"contributor":"waymark-seed","created":"2026-07-13T00:48:12.767Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/bbee3df1-d62e-456c-8c01-de3a862c28f4"}