PDF/X-1a (ISO 15930-1, CMYK Print-Ready)
Open BetaPDF/X-1a:2001 (ISO 15930-1) is the print-ready PDF a print shop asks for. All colour is converted to CMYK (DeviceCMYK), no RGB is left in the file, and the free ECI "ISO Coated v2 300%" profile is embedded — the FOGRA39 print condition: ISO 12647-2 offset on coated paper with a 300% total ink limit. Black and grey print as a single ink (the K plate only), so labels and hairlines do not fall apart in register. There is no transparency in the file — the standard forbids it, so semi-transparent fills are flattened against the page background beforehand.
Vigtigste funktioner
Om formatet PDF/X-1a
PDF/X-1a:2001 (ISO 15930-1) is the strictest and the oldest of the print PDF profiles, and it is the one print houses name most often when they ask for a "printable PDF". Its rule is simple: nothing may be left in the file that production would have to guess. All colour is in CMYK inks, there is no transparency, fonts are inside the file, trim and bleed boundaries are set, and the print condition is described by an embedded profile.
The difference from the neighbouring PDF/X on this site is the colour. That file is PDF/X-3: it stays in RGB with an embedded sRGB profile, and the conversion to ink is done by the print house's prepress. Here the conversion is already done: the file carries DeviceCMYK only, and no RGB is left anywhere — not in fills, not in labels, not in raster inserts. The print house just prints it.
The print condition is ECI "ISO Coated v2 300%": ISO 12647-2 offset on coated paper with a 300% total ink limit. The profile is free and embedded right into the file; it is also declared as the output intent, so the sheet carries its print condition with it and does not depend on someone else's press settings. Because of the embedded profile the file is about 1.3 MB heavier than a plain PDF.
A word about black. Black and grey are separated onto a SINGLE ink — the K plate, not a mix of four. This is the same separation CorelDRAW's native export performs, and it is done for the sake of register: black text and hairlines are laid in one pass, so a shift between the press units cannot put a colour fringe around labels and thin lines. Semi-transparent fills are flattened against the page background beforehand — the standard forbids transparency. The finished file is formally validated and is not handed over if it fails: a file that calls itself PDF/X-1a and is not one gets turned away after the press time has been paid for.
Hvilket program åbner PDF/X-1a-filer
Følgende programmer og applikationer kan åbne, redigere og arbejde med PDF/X-1a (ISO 15930-1, CMYK Print-Ready)-filer (.pdf), der er eksporteret fra OSM2CDR:
Format specifications
- Open standard
- 2D only
- Lossless (no quality loss)
- No attributes
- Output: 1 file
- PDF/X-1a:2001 (ISO 15930-1). Every colour is converted to DeviceCMYK -- no RGB is left in the file; the OutputIntent embeds the free ECI ISO Coated v2 300% profile (FOGRA39, 300% total ink). Black and grey print on the K plate alone, transparency is pre-composed with the page background as the standard requires -- where translucent areas overlapped one another the printed colour differs from the one on screen -- fonts are embedded, TrimBox/BleedBox set. The 3 mm bleed is ADDED outside the page you ordered, not taken out of it: the sheet is rendered 6 mm wider and taller, and what is left after trimming is exactly the size you asked for -- an A4 order is trimmed to A4. The file is validated before it is handed over.
Hvem bruger PDF/X-1a-kort
Sådan eksporterer du PDF/X-1a
Sådan åbner du filen efter eksporten
- Adobe Acrobat Pro — Preflight with the PDF/X-1a check profile: the report shows the colour spaces, the output intent and the TrimBox/BleedBox frames on the page.
- The print house — hand the file over as it is: say that it is PDF/X-1a for FOGRA39 (ISO Coated v2, 300%) and prepress has nothing left to do. If the press runs a different print condition, prepress will reassign the profile on their side.
- Adobe Illustrator or CorelDRAW — open it and inspect the ink separation before delivery: black text must occupy the K plate only.
- Adobe InDesign or Scribus (free) — place the map into the publication layout as a ready-made illustration, the colour is already converted.
- Before the print run — print a proof sheet: the screen shows colour brighter than ink on coated paper, and thin lines read differently on paper.
Populære kort i PDF/X-1a
Få korteksport i PDF/X-1a (ISO 15930-1, CMYK Print-Ready)
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