What is a heat transfer label ?

In contrast to a conventional self-adhesive label, a heat transfer label is not applied in the form of an adhesive substrate.

The design, text or image is first printed in reverse on a temporary carrier (usually siliconised paper or polyester film). An applicator then brings the carrier into contact with the object that is to be decorated. Heat and pressure are then applied to transfer the decoration onto the surface of the object. The carrier is then removed, and all that remains on the object is the printed image.

Depending on the application, the process may also involve an adhesive, a primer or a surface pre-treatment (such as flame treatment) to prepare the object and ensure good adhesion.

Heat transfer labelling is of particular interest because it allows decoration to be transferred directly onto a product without the use of a conventional label.

Industrial and promotional applications : two different market realities

Heat transfer labelling covers several types of applications. In the webinar, Xeikon will focus primarily on just two: industrial and promotional heat transfer labels. Although both are based on a similar principle, the market realities are very different.

Industrial heat transfer is mainly used for plastic containers such as pails, pots, and PP or PE tubes, in a context of high volumes, low unit cost and production efficiency. The key requirements are visual quality, mechanical resistance and competitiveness. This technology is positioned as an alternative to IML, direct printing, screen printing, dry offset, flexography, gravure and sleeves.

Promotional heat transfer labelling is used on objects such as pens, mugs, water bottles and promotional items made from plastic, metal or ceramic. It is characterised by short runs, a high degree of personalisation and a higher perceived value, and there are strict requirements when it comes to image quality, detailed rendering and durability in use. Competing technologies in this market include sublimation printing, pad printing, screen printing, hot stamping, direct inkjet printing, self-adhesive labels and sleeves.

Industrial heat transfer labelling: quality and high volumes

Industrial heat transfer labelling is used mainly for plastic containers for consumer goods, such as paint, oil, food products, cleaning products and other goods packaged in pails, pots or tubes.

The volumes involved are often high. The decoration must be of good quality, adhere well to the container and withstand handling, transport and use. As these are consumer goods, however, unit cost remains an essential criterion.

Heat transfer labelling can, therefore, be considered an alternative to other decoration technologies, such as in-mould labelling, direct-to-object printing, screen printing, dry offset, sleeves, or conventional heat transfer labels printed using flexography or gravure.

The industrial application of heat transfer labelling clearly demonstrates the process's potential, as it results in high-quality, durable decoration that is well suited to high-volume products.

Label printers should note, however, that this process is often integrated by the container manufacturers themselves. In many cases, pail or pot producers apply the decoration directly. Industrial heat transfer labelling reflects the maturity of the technology, and this is not normally the easiest entry point for label converters.

Promotional heat transfer labelling: the most accessible opportunity

The promotional segment has to contend with different priorities, and a decorated object often has a higher perceived value. Decoration identifies a product and also contributes to its appeal. Personalised pens, mugs, water bottles, coolers, promotional items and corporate gifts all need to look refined and be durable in use and can involve a high level of detail.

In this market, volumes can be much lower. Some customers might want to produce just a few personalised items, or even one-off objects. They value personalisation, image quality and the ability to respond quickly to specific requests, rather than just volume.

Digital printing is of particular value when it comes to heat transfer labelling. The technology makes it possible to produce trials, mock-ups, short runs and personalised objects with greater flexibility. Brands can test several designs, prepare a campaign, personalise objects and check a concept without having to commit to large volumes immediately.

For label printers looking to expand their application portfolio, promotional heat transfer labelling represents a genuine commercial opportunity. It allows them to move beyond traditional labels and position themselves in the object decoration segment by offering applications with a higher visual value.

Digital heat transfer, short runs and personalisation

Historically, some heat transfer applications were more closely associated with large volumes and analogue processes. Digital printing has changed this by making the process more accessible for short runs, multiple versions, personalised visuals or variable elements, depending on the needs of the project. It also helps speed up work on prototypes, design tests and specific campaigns.

This flexibility is particularly important in the promotional segment, where customers are not always looking for high volumes. Sometimes they want a distinctive object, precise personalisation, a high-quality finish or faster delivery. Digital printing helps label printers meet these expectations while maintaining a high level of visual quality.

The process is also of interest from the perspective of the materials used. In the heat transfer process, only the printed decoration remains on the final object. The temporary carrier is removed after transfer and can be recycled (depending on the recycling possibilities available). This also helps to reduce the amount of material remaining on the finished product compared with traditional labels, which remain on the packaging.

Success depends on technical expertise

Transferring an image onto an object using heat and pressure is a technical application that might appear simple, but the final result depends on many factors: the print carrier, the surface to be decorated, the adhesive used (if any), the pre-treatment, the temperature, the pressure, the applicator, the consumables and the durability requirements for the final product.

Converters that are considering this application need to bear this in mind. Success depends as much on the digital press as on mastering the entire process. Xeikon's experts help customers understand how to implement heat transfer labelling in the right conditions. They can answer questions on which consumables to choose, how to adapt the process to the surface to be decorated, which settings to use, how to achieve reliable and durable decoration and many other matters.

The untapped potential of heat transfer labels

Heat transfer labelling is not a new technology but it remains relatively unknown in the label industry. In any event, it is not always considered by companies that are thinking about diversification and that is precisely what makes the technology interesting.

In industrial applications, the technology has proven its ability to decorate high-volume containers with good quality labels that are resistant in use. In promotional applications, it opens up more directly accessible opportunities for label converters: short runs, personalisation, mock-ups, objects with a high perceived value and high-quality visual applications.

“Label printers looking to expand their application portfolio should certainly consider heat transfer labels,” said Hans Verberckmoes, Application Manager at Xeikon.

At a time when many label printers are looking to expand their offer, heat transfer labels deserve to be brought back into the spotlight.