CONSIDERATIONS FOR DESKTOP UV PRINTING AS MARKET EXPANDS

Desktop UV printing has changed considerably over the past decade. Equipment once appealed mainly to print providers comfortable with industrial inkjet. However, it is now showing up in sign shops, promotional product businesses, engraving operations, packaging environments and small manufacturing companies. Smaller footprints and lower prices have helped. As have workflows that make the equipment easier to operate. At the same time, the applications have become more ambitious. Today’s buyers are looking beyond straightforward CMYK printing to white ink, clear effects, texture, raised printing and an expanding range of substrates and objects. More choice should make buying easier. In practice, it gives buyers a lot more to think about.

“The application should drive the decision”

The basic appeal is easy to understand. Desktop UV systems can print directly onto rigid and semi-rigid objects without the screens, plates and setup associated with many conventional decoration methods.

Artwork can also change from object to object. That is what makes the technology well suited to short runs, one-offs and products carrying different names, logos, designs or serial numbers.

Personalisation has given businesses another reason to consider desktop UV systems. A relatively inexpensive blank – such as a phone case, bottle, award or desk accessory – can take on greater value when it is customised for a particular customer, company, event or occasion.

Promotional products and personalised giftware remain important applications. But the possibilities extend into corporate merchandise, event giveaways, awards and seasonal products. For businesses handling small online orders, the ability to produce customised pieces without lengthy setup is particularly useful.

CMYK tells only part of the desktop UV story. White and clear inks have been available for years, allowing users to work with coloured and transparent substrates and create gloss, matte and other effects. Developments in ink formulations, primers and layering techniques are pushing those capabilities further still.

Repeated passes of white or clear ink can create raised lettering, textured graphics, braille and effects that resemble embossing. These techniques give designers more ways to make an ordinary object look and feel distinctive. They also make production more complicated.

A job using CMYK alone is very different from one involving white ink, primer, clear ink and multiple raised layers. Each additional process adds to production time. In addition, ink circulation, curing, registration and maintenance all matter more as the job gets more demanding.

That is where headline specifications start to matter less. A device may have an impressive top speed, but that figure does not necessarily indicate how long a textured, multi-layer job will take to produce.

Automation is making a difference. Particularly when looking at the entire production process rather than print speed alone. Loading an object, positioning it correctly, preparing the file, setting the appropriate height, printing, cleaning and unloading all take time. Across a working day, those minutes add up.

Manufacturers are increasingly using cameras and scanning systems to identify the position and orientation of objects on the bed and align artwork automatically. This can reduce the need for dedicated jigs in some applications. Automated height detection, nozzle monitoring and ink agitation can remove other manual steps. Furthermore, artificial intelligence (AI) is beginning to assist with processes such as multi-pass textured printing.

For a busy operation, these developments can matter as much as carriage speed. 
A machine that saves operator time during setup – and reduces intervention throughout the day – may deliver a very different production experience from one that appears faster when comparing specifications.

UV direct-to-film (DTF) is adding another dimension to the market. Rather than printing directly onto the final object, UV DTF produces a transfer that is then applied to it. That makes the process useful for curved, irregular or difficult-to-load objects that may not be practical on a conventional desktop flatbed. There is room for both approaches.

Direct-to-object (DTO) printing makes sense when products can be positioned accurately and the workflow is repeatable. UV DTF extends decoration to objects that are awkward to load or may only be required in very small quantities.

For businesses considering either technology, the application should drive the decision. The shape of the product, order quantity, required finish, production process and amount of handling involved all deserve consideration.

Comparing desktop UV printers has become more difficult. This is partly because the number of choices is increasing. Established Japanese manufacturers including Roland, Epson, Mutoh and Mimaki are now competing with a growing number of entrants. Many of these are from China and offer machines at considerably lower prices. Buyers are also encountering these products differently. Manufacturer websites sit alongside YouTube demonstrations, social media content and influencer reviews.

There is plenty of information available. Deciding which details really matter and which claims will hold up in production is harder. Resolution is a good example. The numbers keep climbing, but maximum resolution tells you relatively little about how a machine will perform across the jobs a business produces every day.

The same applies to substrate compatibility. Saying that a printer can print on metal, plastic or glass does not explain how a particular material, coating, primer, ink combination and curing process will perform.

Productivity poses certain questions. What happens to output when white ink is introduced? How much additional time does varnish require? What happens when several layers are needed to create texture? How much operator attention does the machine need during a normal working day?

Colour consistency matters too, particularly when a customer returns several weeks later and wants another batch of the same branded product. These are practical production questions and they are difficult to answer from a brochure.

Start with the work the machine will actually be expected to produce. Judge productivity using realistic jobs and print modes, not maximum engine speed alone. Image quality should include colour accuracy, fine detail and gradients, along with barcode and QR-code readability where those elements are part of the application.

Consistency deserves close attention. Short-run production does not remove the need to reproduce a colour or design accurately when a customer places another order.

Durability is another important consideration. Depending on the application, printed products may be scratched, rubbed, cleaned with chemicals or exposed to prolonged light. A visually impressive sample immediately after printing does not show how that product will look after regular use.

Take the same practical approach with costs. Ink consumption is one part of the calculation, alongside cleaning, maintenance, failed prints and operator time. Together, these determine far more about the economics of a job than headline speed or resolution.

“Durability is another important consideration”

These are the principles behind Keypoint Intelligence’s Desktop UV Printer Test Service. The company’s testing examines productivity, image quality, consistency, durability, usability and day-to-day operation under a repeatable methodology. The purpose is to understand how individual systems behave under realistic production conditions and give the market comparable performance information.

Desktop UV will continue to become easier to use and capable of handling more applications. Object recognition and positioning should reduce manual setup further. While developments in inks and primers will keep expanding the range of materials and effects businesses can offer. 
UV DTF also gives companies another route to products and shapes that are difficult to decorate directly.

For buyers, that makes understanding the details increasingly important. Two printers can look remarkably similar when their specifications are placed side by side. However, they can behave quite differently once real jobs start moving through them.

The most useful questions are therefore practical ones. How long does the complete job take? How much operator involvement does it require? Does the colour remain consistent? Will the finished product withstand its intended use? What does each sellable piece actually cost to produce? The answers say much more about a desktop UV printer than the numbers on its spec sheet.