folio FOGRA39 CMYK output profile — NOTICE
==========================================

File:     folio-fogra39-5bfbe4308861181c.icc
SHA-256:  5bfbe4308861181c149d11174683d74724faaa2bff2be31448736918d87905b0
Size:     761 196 bytes (ICC v2.2, output class, CMYK -> Lab PCS)
Desc:     "folio FOGRA39 CMYK (TAC 330%)"

What it is
----------
folio's own ICC output profile for the FOGRA39 printing condition (ISO 12647-2:2004/Amd 1, offset on
paper type 1/2, gloss or matte coated). It is embedded in every CMYK print PDF folio makes, as the
PDF/X OutputIntent (OutputConditionIdentifier "FOGRA39", RegistryName "http://www.color.org").

It is NOT the ECI "ISO Coated v2" profile and contains no part of it. It is NOT certified, approved or
endorsed by Fogra; "FOGRA39" only identifies the reference characterisation data it was built from.

Source data
-----------
FOGRA39L characterisation data (1617 patches; CMYK -> CIE XYZ / CIELAB, D50, 2 degree, 45/0), by
Fogra Forschungsinstitut fuer Medientechnologien e.V. (www.fogra.org).
  Downloaded from: https://fogra.org/en/downloads/work-tools/characterisation-data
    archive  https://fogra.org/fileadmin/files/7_downloads/Charakterisierungsdaten/FOGRA39_to_FOGRA60_v2.zip
             SHA-256 4d20d72b4f6ffa07e7e3e3bb301c8b2d18b0ac1af06940f78b3126527cc8f0b1
    file     FOGRA39.txt  (DESCRIPTOR "FOGRA39L", CREATED "December 2006")
             SHA-256 5210c4a671895a739e6dbe53a3e9923f990fdce8272da7b31b08d1ffd9fce1e8
  The same data set is listed in the ICC Characterization Data Registry
  (https://registry.color.org/cmyk-registry/fogra39).

Fogra's terms of use, quoted from the download page (retrieved 2026-10-05):
  "Free use and redistribution of the Fogra characterisation data is permitted, including redistribution
  as part of commercial and non-commercial software, provided that the data are distributed unmodified and
  Fogra is identified as the source. The designation FOGRAxx may be used solely to identify the respective
  reference data. Such use does not imply certification, approval or endorsement by Fogra."

The data file is kept unmodified in folio's source repository (ui/wasm/icc/data/FOGRA39.txt) as the build
input. The profile itself carries none of the measurement data (built with colprof -nc).

How it was built (reproducible; two clean builds are byte-identical)
--------------------------------------------------------------------
ui/wasm/icc/build.sh in folio's repository:
  - container debian:bookworm-20250929-slim
    @sha256:7e490910eea2861b9664577a96b54ce68ea3e02ce7f51d89cb0103a6f9c386e0 (linux/amd64)
  - packages from snapshot.debian.org/archive/debian/20250929T000000Z: argyll 2.3.1+repack-1.1+b1
  - txt2ti3 FOGRA39.txt fogra39
  - colprof -qm -bh -kr -l330 -L95 -nc -s sRGB.icm -cmt -dpp  (A2B 9^4 + 1024-point curves, B2A 33^3;
    medium (ramp) black generation; total ink 330 %; black 95 %; perceptual table gamut-mapped from sRGB,
    relative colorimetric unmapped)
  - header creation date fixed at 2026-10-05T00:00:00 for reproducibility.

ArgyllCMS (AGPL-3.0, by Graeme W. Gill) is used only at build time and is not distributed with folio.
Its documentation states: "the profiles created using ArgyllCMS, are not subject to any claims or
restrictions of ArgyllCMS's author(s), but are assumed to be the copyright property of the person who
gathers the characterization data, and causes the profiles to be created."
(https://www.argyllcms.com/doc/ArgyllDoc.html, "Copyright, Licensing & Trade Mark")

Use of this profile
-------------------
Because every PDF folio exports embeds it, anyone may use, embed and redistribute this profile unchanged
together with those PDFs. Attribution of the source data: Fogra (www.fogra.org).