What Is RISO Ink — And Why It Prints Differently from Regular Ink

If you've never worked with RISO before, the first thing that surprises most people is how the ink behaves. It doesn't fuse. It doesn't cure under UV. It absorbs into the paper on contact — cleanly, quickly, and at room temperature.

That's because RISO ink is oil-based pigment, not water-based dye or plastic toner. The oil base carries the pigment onto the paper surface and absorbs into the fiber, leaving the pigment sitting on top. The result: a print that dries instantly, resists water, and holds up under heavy handling — exactly what high-volume commercial printing needs.

One thing worth confirming upfront: RISO makes two completely different printing systems, and their inks are not interchangeable. If you're managing ComColor machines, you need sealed cartridges. If you're running Risograph duplicators, you need ink cylinders and drums. Everything from here covers ComColor.

What's Inside RISO Ink — Composition and How It's Made

Most ink suppliers tell you what their ink does. We'd rather show you what's in it — because that's what determines whether it's safe for your machines, compliant for your markets, and consistent across every batch.

How every batch is made and released:

We don't ship a batch until it clears every stage. That's the only way to guarantee the certificate number on the documentation matches what's actually inside the cartridge.

Two RISO Ink Formats — ComColor Cartridge vs Risograph Cylinder

Before ordering, confirm which system you're working with. It's a more common mistake in procurement than most people expect — especially for first-time RISO buyers managing mixed machine fleets.

ComColor machines use sealed 1,000ml cartridges — one per color channel, slotted directly into the machine. No drum, no master, no stencil process.

Risograph duplicators use ink cylinders that load into color-specific drums. Changing color means swapping the entire drum unit.

RISO ComColor Ink Part Numbers — Full Series Reference

The model number on the front panel of your machine tells you everything. Cross-reference it below, confirm the part number, and you're done. Click any series name to view the product page.

GL9730 and GD9630 are often confused in procurement — they use different chip systems and different part numbers. Ordering GD ink for a GL machine will trigger a compatibility error. If you're unsure, send us your model number and we'll confirm before you order anything.

OEM vs Certified Compatible RISO Ink — What the Numbers Actually Look Like

We're not going to tell you compatible ink is always the right choice. What we will do is show you the actual numbers so you can make that decision yourself.

For a print operation running four GL9730 machines at 50,000 pages per month each, switching to certified compatible ink saves approximately $37,000 per year on ink alone. That's not a rounding error — that's a real budget line.

The risk is real but specific: it's concentrated in uncertified compatible ink with unknown particle size and unverified viscosity. A certified compatible ink from a verified manufacturer carries the same practical risk profile as OEM.

Three Things to Verify Before You Order Compatible RISO Ink

We've been in this industry long enough to know where procurement goes wrong. It's almost never the price. It's almost always one of these three things.

How to Order Factory Direct — Sample First, Then Scale

We manufacture in Guangzhou and ship directly to distributors, print shops, and procurement teams across Europe, Asia, the Middle East, and beyond. No middleman. No distributor markup.

Here is how most of our B2B relationships start:

We don't push for bulk commitments before you've tested the product. If the ink doesn't perform the way we say it does, we'd rather know that on a single cartridge than after you've ordered a pallet.

Questions Buyers Ask Before Their First Order