Global Textile News & CAD Insights

Rotary printing uses engraved metal cylinders, one per color, to print continuously across very large volumes of fabric. This article looks at what rotary printing is and how it compares to screen printing, the central constraint every designer needs to anticipate, a pattern repeat locked to the exact circumference of the cylinder, and the complete production process from pattern design through color separation, cylinder engraving, ink preparation, and mounting on the press. It covers why rotary remains unbeatable at large volumes, the technical requirements to respect before engraving, and how Pointcarre's Natural Blend Color feature predicts the final result to reduce the number of cylinders and samples needed, before placing rotary alongside digital and screen printing as a production choice rather than a design tool choice.

Rotary printing remains, even today, the reference technology for large scale textile production. Home furnishings, bed and bath linens, high volume apparel: whenever a pattern needs to be printed across several thousand meters with perfect consistency from one end of the roll to the other, the industry turns to rotary. But this technology comes with very specific technical constraints, largely unknown outside production facilities, and they need to be anticipated as early as the pattern design stage. This article breaks down that process, for textile designers and manufacturers who want to understand what happens between the file and the cylinder.

What is rotary printing

Rotary textile printing uses perforated metal cylinders, one per color, mounted on a press and rotated continuously against fabric moving beneath them. Inside each cylinder, a squeegee forces ink through perforations engraved into the metal, which exactly reproduce the areas of the pattern to be printed in that color. The fabric advances continuously while the cylinders rotate in sync, allowing very high production speeds and pattern consistency that is hard to match over long yardages.

In principle, this is close to traditional screen printing: each color corresponds to a separate physical support (a cylinder rather than a flat screen), so the pattern must be broken down into color channels before engraving. The fundamental difference from flat screen printing is that rotary printing runs continuously, with no dead time between passes, which makes it economically unbeatable at large volumes, whereas flat screen printing remains better suited to short or medium runs.

The central technical constraint: the repeat imposed by the cylinder

This is the single most important point to understand for anyone preparing a pattern for rotary printing, and it is also the most common source of error among designers new to this technology. Unlike digital printing, where the repeat can be set freely to any size, each cylinder's circumference is fixed. It is determined by the printer's machine park, within a range of standard sizes. The pattern's vertical repeat must therefore be calculated to match that circumference exactly, or the pattern simply cannot be engraved onto that cylinder without distortion or rescaling.

In practice, this means a pattern designed for digital printing or flat screen printing almost always needs to be reworked before it can move to rotary, so its repeat lands precisely on the circumference available at the chosen printer. This is a genuine pattern engineering task, one that requires tools capable of recalculating a clean repeat without introducing visible seams or misalignment. This is exactly where Pointcarre's Print module earns its place, with repeat matching and pattern cleanup tools built to produce a flawless repeat, and a Repeat Maker that automates this process from an imported image, a real time saver when several cylinder sizes need to be tested before locking the final version.

The complete process, from pattern to printed fabric

Like any industrial textile production, rotary printing follows a precise sequence of steps.

It starts with pattern design and file preparation. At this stage, the repeat already needs to be designed around the target cylinder circumference, and the distinct colors in the pattern need to be clearly identifiable to allow the separation that follows.

Next comes color separation, the step that breaks the pattern down into as many channels as there will be cylinders on the machine. This is a critical step: each channel corresponds to a costly physical engraving, so any separation error upstream directly affects production cost and lead time. Pointcarre's Print module handles color separation up to 56 channels, with direct Photoshop channel import and export, allowing the final palette to be refined without rebuilding the file across different pieces of software.

The third step is cylinder engraving. Historically produced from positive films as in screen printing, it is now most often done through direct laser engraving from the digitally separated file, removing an intermediate step and tightening precision between color channels. Each engraved cylinder corresponds to a single color in the final pattern.

Ink preparation follows, often called the color kitchen: inks are mixed and adjusted to precisely match the color references approved with the client, generally against Pantone standards or the printer's own color books. This is a stage where a gap between the on screen simulation and the actual result on fabric can be costly to fix if it is not anticipated before the cylinders are mounted.

Then comes mounting and setting the cylinders on the press, with careful registration adjustment between each color so the channels land exactly on top of one another during printing. Once the press is set and an initial strike off approved, continuous production can begin, followed by post treatment (steaming, washing, heat setting depending on the inks used), quality control across the full run, and finishing.

Why rotary remains essential at large volumes

The economic case for rotary printing lies in its ability to hold a very low cost per meter across long runs, once the cylinders are engraved and amortized. This is the exact opposite of digital logic, where setup cost is close to zero but cost per meter stays high. In practice, rotary becomes cost effective once volumes reach several hundred, or several thousand, meters of the same pattern, which is typically the case for home furnishings, bed and bath linens, and large scale apparel production.

This volume driven logic also changes the tolerance for error. A separation or repeat mistake discovered after the cylinders have been engraved is far more expensive to fix than an error caught in a digital file before printing, since one or more cylinders may need to be re engraved. Predicting the final result before committing to engraving becomes a direct financial concern, not just a quality question.

That is where Pointcarre's Natural Blend Color feature comes in, simulating ink mixing before production. By giving a reliable preview of the final result, it helps reduce the number of cylinders needed by cutting redundant colors, while also lowering the number of physical samples required before approval, a benefit that is both economic and environmental, and particularly meaningful on a production method that commits this much ink and physical tooling upfront.

The technical requirements to anticipate before engraving

As with any production method involving separation into physical channels, a few rules limit the risk of rework.

File resolution needs to stay consistent with the fineness of engraving targeted on the cylinder: a fine pattern or one with gradients demands more careful preparation than a simple flat color block. The number of distinct colors needs to be controlled from the design stage, since every additional color adds a cylinder, and therefore engraving cost and an extra registration risk. As with screen printing, beyond a certain number of channels, adding more colors does not necessarily improve the perceived result, but it does noticeably raise complexity and the risk of misalignment between colors on the press.

The working file format needs to preserve channels in a usable way, with TIFF remaining the reference for production and PSD keeping full editability while the file is still being refined before it is locked for engraving. This is also exactly where Adobe Photoshop file compatibility matters in a professional setting. Being able to import and export Photoshop channels directly inside a textile CAD software avoids manually rebuilding every separation, a time saving that counts twice over given that each channel later becomes a physical engraving.

Rotary, digital or flat screen printing: a production choice

It is worth placing rotary printing within the full range of available technologies rather than looking at it in isolation. The choice between rotary, digital and flat screen printing is not a design tool choice, it is a production choice, driven above all by volume, lead time and setup budget. Rotary dominates at very large volumes thanks to its unbeatable cost per meter once cylinders are amortized. Digital remains unbeatable for short runs and fast turnaround, with no engraving commitment. Flat screen printing sits in between, more flexible than rotary at medium volumes.

A designer or style office working with several printers, potentially across several technologies depending on the project, needs a single working environment capable of preparing a pattern for any of these three paths without starting from scratch each time. That is exactly the logic behind Pointcarre's Print module, built to cover digital, rotary and screen printing within one application.

In summary

Rotary printing remains the reference technology for large volume textile production, but it imposes a constraint that few other methods enforce as strictly: a pattern repeat locked to the exact circumference of the cylinder, rigorous color separation ahead of engraving, and a precise prediction of the color result before any physical production commitment. For more than 40 years, Pointcarre has supported style offices and textile manufacturers through this demanding chain, with repeat tools, separation up to 56 channels and ink blend simulation, all within a single application, native on both Mac and PC, with no reliance on third party plug-ins.