Print Film Positives Without a RIP (or the Distiller Workaround)

The DIY Film-Positive Workflow People Actually Use

If you print screens at home or in a small shop and don't want to spend $400+ on a dedicated RIP, you've probably seen (or built) a workflow that looks like this:

1. Manually select and separate the spot colors in Photoshop or Illustrator.
2. Build a white underbase and add a choke so the white tucks under the colors.
3. Halftone each channel so it prints as a dot field, not solid ink.
4. Print to an Adobe PostScript (.ps) file instead of to paper.
5. Run that .ps file through Adobe Distiller to get a PDF.
6. Print the PDF to an inkjet — often a Canon PIXMA — loaded with a UV-blocking dye or pigment on inkjet film.

The end result is a stack of film positives dense enough to burn screens with. It's a genuinely clever way to get pro output out of consumer hardware. The catch is that it's six manual steps held together with legacy Adobe tools, and every one of them is a place to make a mistake.

Why People Take the PostScript + Distiller Detour

The whole detour exists to solve one problem: getting a clean, halftoned, full-density film out of a printer that has no RIP driving it.

A RIP (Raster Image Processor) like AccuRIP or Filmmaker does two things. First, it screens your grayscale separations into halftone dots at the LPI and angle you choose. Second, it drives the printer to lay down the maximum amount of ink so the black areas are opaque enough to block UV during exposure. Without a RIP, a normal print driver often lightens blacks and color-manages your film into something too thin to burn.

Printing to a PostScript file and distilling it to PDF is a way to sidestep the color-managed print path and hand the printer something predictable. It works — but you're doing the RIP's job by hand, one file format at a time, and you still need software that produced correct halftones in the first place.

Where the Manual Method Breaks Down

Every extra step is a failure point:

• Grayscale instead of dots. If your separation is continuous-tone gray and you never halftone it, the printer or the exposure can't hold the midtones. Film positives need to be 1-bit halftones — solid black dots on clear film — not soft grayscale.
• Weak black density. If the print path color-manages your film, the "black" comes out charcoal and lets UV through. Underexposed-looking screens and blown-out detail usually trace back to thin film, not the exposure unit.
• Underbase that peeks out. A white underbase that isn't choked will show a white halo around your colors the moment registration drifts a hair. Adding the choke by hand is fiddly and easy to forget.
• Distiller quirks. PostScript-to-PDF conversion can rescale, re-sample, or shift your art if the page setup isn't exactly right, so the film comes out the wrong size or soft.
• It's slow. Six steps per design, times every job, adds up fast — and none of it is the part customers pay for.

The Shortcut: Export Film Positives Directly

None of this requires Photoshop, PostScript, or Distiller. The only thing that actually matters is the file that comes out the end: a halftoned, black-on-white film positive for every ink, plus a choked white underbase for dark garments. If your separation tool produces those directly, the entire middle of the workflow disappears.

That's what AI Separations does. Upload your art, pick how many inks, and choose an LPI that matches your mesh — 45 for bold 110–125 mesh, 55 for a standard 156, or 65 for fine detail on 200+. It separates the art, screens each channel into a real halftone at its own angle, and builds a white underbase choked inward so it hides under the colors. You download press-ready film positives you can print straight to your inkjet film. No .ps file, no Distiller, no RIP.

Because the plates come out as 1-bit black-on-white film — the same thing a RIP would hand your printer — you print them at full black ink and burn as usual. The UV-blocking ink or dye you already use (AccuInk and similar work fine) does the rest. You've replaced a six-step Adobe chain with "separate, download, print."

Getting Dense, Burnable Film From a Regular Inkjet

The shortcut still depends on printing dense film. A few things that don't change no matter how you separate:

• Use real film and UV-blocking ink. Waterproof inkjet film plus a dye or pigment marketed as UV-blocking. Plain ink on transparency sheets rarely gets opaque enough.
• Turn off color management and print at max black. You want the printer laying the most ink it can into the black areas. If your print dialog has a "maximum" or "photo black" density option, use it.
• Match LPI to mesh. Too fine an LPI on too coarse a mesh drops out dots; too coarse looks blocky. Start at 55 LPI / 156 mesh and adjust from there.
• Keep the choke on your underbase. One to two pixels of choke is usually enough to kill the white halo without starving the coverage.
• Do a step test. Burn an exposure test once for your setup; dense film plus the right exposure time is what actually holds halftone dots.

Get those right and a $60 inkjet loaded with UV-blocking dye makes film every bit as burnable as a RIP-driven setup — without the RIP, and without the Distiller dance.

Frequently asked questions

Do I need a RIP to print film positives?

No. A RIP (AccuRIP, Filmmaker, etc.) does two jobs: it halftones your grayscale channels into dot screens, and it drives the printer to lay ink at maximum density. If your separation software already outputs halftoned, black-on-white film positives, you can print them straight from a normal image or PDF viewer set to full black ink — no RIP required. A RIP mainly saves you time and squeezes a little more density from the printer.

What is the Adobe PostScript + Distiller method?

It is a DIY workaround for people who do not own a RIP. You separate and halftone your art, print it to an Adobe PostScript (.ps) file instead of to paper, then run that file through Adobe Distiller to convert it into a PDF. The PDF is then printed to an inkjet loaded with a UV-blocking ink or dye. It works, but it is several manual steps and depends on legacy Adobe tools.

Will a regular inkjet with dye ink block enough UV to burn a screen?

It can, if you use a dye or pigment marketed as UV-blocking (products like AccuInk and similar) on inkjet film, print at full density, and expose with a decent test. The film has to be opaque enough that light does not pass through the black areas. Halftone dots must print as solid, edge-crisp black — which is why film positives should be 1-bit halftones, not soft grayscale.

What LPI should my film positives be?

Match LPI to your mesh: roughly 45 LPI for 110–125 mesh (bold, high-opacity work), 55 LPI for 156 mesh (a safe all-around default), and 65 LPI for 200+ mesh (fine detail). Higher LPI holds more detail but is harder to burn and print cleanly, so start conservative and raise it only if your exposure and press can hold the dot.

Can I make film positives without Photoshop?

Yes. AI Separations separates your art and exports halftoned film positives — plus a choked white underbase for dark garments — in your browser or as a standalone Windows app. No Photoshop, no PostScript file, no Distiller step. Pick an LPI, separate, and download press-ready film.