The output intent a file carries, printed on the page it describes: the printing conditions, their description and the profile behind them, with a ramp and one swatch per ink painted through that same profile. Hand a press profile on the command line and the page is drawn in that press's inks instead.
A page that fills a rectangle with four numbers has said four numbers and nothing at all about what colour they make. The output intent is the answer: the profile of the device the job was prepared for, travelling inside the file, together with the name of the printing conditions it was prepared for.
A file that declares itself made for archiving is obliged to state one, so this is a piece every PDF/A file needs. The page prints the intent it carries and paints a ramp and one swatch per ink through that same profile; hand it a press profile on the command line and it is drawn in that press's inks instead.
The same document is written twice, once in each language. Both files are shown in full, with the code coloured on the server, and can be copied in one click.
The same document is written in each of these languages. Open the one you want to look at.
| Before | 119,232 bytes |
|---|---|
| Now | 49,002 bytes |
| Saved | 58.9 % |
Not one mark on the page changed. See every document measured.
Swatches in each of the three ways to say a colour — a grey as one number, a screen colour as three, a printing colour as four inks — each captioned with the instruction actually written into the file, and one mid-grey said three ways.
The same six colours said as bare numbers and then read through the sRGB profile the file carries, plus a ramp from light to dark and a sweep of hues in CIE L*a*b*: colour that still means the same thing on another screen and on a press.
Two inks the press carries on a plate of their own, each at ten strengths, a piece of work set in both, and the crosses used to line the plates up — drawn in an ink every plate answers to.
Eight choices of plate among the four usual inks, each with the small program that shows it printed underneath, and two inks the press carries itself used together, every strength of one against every strength of the other.
A chart of house colours the file carries, and a drawing whose sixteen numbers are places in that chart rather than colours. The same drawing is shown twice through two charts: repainting a whole brand is one table, not every drawing.
One pattern that states no colour of its own, laid down in five colours and in five strengths of one press ink: the fill says what colour to lay it down in. Beside them, the same hatch made of patterns that carry their own colours, which is one pattern per colour.