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DTF - FAQ

DTF printing, Direct to Film (DTF), is a digital printing method that involves printing designs on a special film and then transferring them to various fabrics using heat and pressure. Unlike traditional printing methods, which require printing directly onto the fabric, DTF printing prints onto a transfer film.

DTF printing is versatile and suitable for both light and dark fabrics. It can be used on a variety of fabrics including cotton, polyester, 50/50 blends, leather, nylon, canvas and other fabrics. It works perfectly on t-shirts, reflective waistcoats, hats, masks, shoes, banners, towels, aprons, bags and much more.

DTF printing is valued for its flexibility and ease of use. It can be used on a wide range of fabrics, including cotton, polyester and blends, and requires no fabric pre-treatment, unlike other printing methods. This makes DTF an accessible and versatile option for both small-scale custom projects and larger production runs.

Direct-to-foil (DTF) printing is a multi-stage process of transferring a design from a special film to different fabrics.

  • Project preparation: First, a digital design is created or selected. This design is then processed in specialised software that prepares it for DTF printing.
  • Printing on foil: The design is printed on transparent PET film using a special DTF ink. These inks are usually a combination of CMYK colours and white. The white ink is applied last and forms the base for the CMYK inks on darker fabrics.
  • Application of adhesive powder: Once the design has been printed on the film, adhesive powder (usually a polyurethane mixture) is evenly spread over the wet ink. This powder sticks to the printed areas.
  • Melting powder: The film already containing the adhesive powder is passed through a heat source (such as an oven or heat press). The heat melts the powder without distorting the printed image. This process turns the ink and powder into a solid, transferable film.
  • Transfer to fabric: The film with the melted powder and ink is then placed on the fabric and a thermal press is used to create heat and pressure. In this process, the ink and adhesive mixture is transferred from the film to the fabric.
  • Final product: The film peels off, leaving the design adhered to the fabric. The result is a vibrant, high-quality print that is durable and resistant to washing and wear.

Although direct-to-foil (DTF) printing is known for its versatility and compatibility with a wide range of fabrics, there are some materials that do not lend themselves well to this printing technique. Because DTF prints require a certain level of porosity to adhere properly. Non-porous materials such as nylon, some types of polyester and coated fabrics can present challenges for DTF inks and adhesives.

High-quality DTF prints typically last 40-50 washes or more without significant print deterioration, such as fading or cracking, if proper washing guidelines are followed. To maximise the durability of DTF prints on T-shirts or other garments, it is recommended:

  • Wash in cool water
  • Use mild detergents and avoid bleach
  • Hang up to dry or use low heat in the dryer
  • Avoid direct ironing on the printed area

Following these care instructions can help to maintain the life and integrity of DTF prints over many wash cycles.

The main difference between DTF (Direct to Film) and DTG (Direct to Garment) printing is in the process and application:

Print DTF - It involves printing designs on a special film, applying adhesive powder, melting it and then transferring the design from the film to various fabrics using heat and pressure. It is versatile, can work on a wide range of fabric types without pre-treatment and allows for vibrant prints on both light and dark garments.

Print DTG - Prints directly onto fabric using specialised inkjet technology. It is primarily suitable for cotton or high cotton content fabrics, and for dark garments often requires pre-treatment to ensure colour intensity and print permanence. DTG is known for its detail and quality for short runs.

For DTF films: Avoid moisture and direct sunlight

For DTF inks: Store inks away from direct sunlight and at a stable, moderate temperature (15-25°C or 59-77°F is ideal). Also ensure ink containers are sealed to prevent exposure to air and evaporation.

Other brands of DTF printers may experience nozzle clogging, improper film feeding, ink smearing, white ink build-up or colour accuracy problems. Do not hesitate to ask us for help. With the Otter DTF All-In-One System, you can avoid or significantly reduce these common problems. Our system includes genuine Epson printheads, an automatic white ink circulation system, an air suction function to keep the film flat, and an integrated curing system for efficient powder shaking and adhesion. These innovations ensure smooth and reliable DTF printing in everyday operations.

Here are some refined maintenance tips to keep your DTF printer running smoothly:

Regular cleaning

Keep the printer and its components clean, concentrating on the printheads and feeding mechanisms.

Use high quality inks and consumables

Invest in high-quality inks, transparencies and DTF powder to reduce the risk of clogging and ensure optimum print quality.

Keep the printer environment clean

Dust and dirt can affect the print quality and even damage the printer. Keep the printer area clean and cover the printer when not in use.

Choose a reliable DTF delivery partner

Choosing the right supplier of essential DTF supplies is crucial. We are here to support the growth of your business by providing top quality consumables and expert advice.

By implementing these maintenance practices, you can extend the life of your DTF equipment and achieve consistent, high-quality print results.