What You Need to Know about Direct-to-Film Printing
Looking for a new printing method with incredible colour vibrancy that can help you expand your product offering? If the answer’s yes, then you’ve come to the right place.
Right now, direct-to-film (DTF) printing is one of the most versatile techniques available in the print industry.
Most print methods are limited to a range of similar fabrics, like cotton and cotton-blended materials. With a DTF print, you can work with tougher fabric varieties like polyester, fleece, nylon, and of course, classic cotton.
Read on to learn more about the DTF printing process and how it compares to other printing methods.
What is DTF printing?
DTF printing involves printing a design onto a piece of PET film (a special film with a coating that helps transfer designs) using water-based inks and a special powder adhesive. Then, the design on the PET film is heat transferred to fabric using a heat press machine. This printing method is durable and the designs come out very detailed and vibrant.
How does DTF printing work?
DTF printing is fairly quick to do compared to other printing methods. It’s also a great choice for printing detailed designs on bulky, outdoor apparel.
Interested in how it works? Let’s break down the DTF printing process.
Step 1: Preparing the film and powder adhesive
First, a PET film is prepared and placed in the DTF printing machine where the entire design is printed in colour.
After the first layer is created, the machine prints a white layer over the entire image, completely covering the first layer. Check out the image below if you’re curious about how DTF print designs look once printed on PET film.
Next, a powder adhesive is uniformly applied onto the wet ink. After applying the powder evenly and removing all excess powder, the film is heated to prepare it for fabric transfer. Adhesive heating is done in either a curing oven or with a heat press machine.
Step 2: Pre-pressing fabric and using a heat press
With the PET film preheated, the fabric receiving the design gets dehumidified and pre-flattened by being kept under heat for 2 to 5 seconds inside the heat press machine.
After initial flattening, the film is taken and placed on the pre-pressed fabric. The design on the film is then transferred using a heat press for 15 seconds at an average temperature of 150°C onto the garment.
Step 3: Peeling the film and post-pressing the fabric
With the design transferred onto the fabric, the second to last step is to carefully cold peel the film. When the film is removed, the designed fabric is flattened a second time in the heat press to help improve the design’s durability. After post-pressing, the garment is ready to pack and ship to customers.
DTF printing compared to other print methods
With so many print methods to choose from, you’ve got to narrow down which method suits your long-term business goals the best. To make it easier for you, we’ve put together a brief comparison of DTF printing alongside other popular print techniques.
Pay attention to the types of designs and fabrics that work best for DTF prints, DTG prints, as well as with sublimation or screen printing. That way, you’ll be able to plan what techniques to use with your brand’s product selection in mind.
Direct-to-film vs. screen printing
Screen printing is one of the most popular methods to use in the printing industry. This print method works by pushing ink layer by layer through a woven screen or mesh stencil onto fabric.
A woven screen has to be made for each color and design element, and at the end of the printing process, ink lays on top of the fabric instead of soaking into it. Screen-printed designs can also feel different depending on how detailed the original artwork is. More art details require more ink layers, resulting in a thicker feel on the garment. When it comes to DTF printing, the transferred design has a more uniform feel that doesn’t become thicker no matter what colors or design elements are added.
Screen printing works best for solid designs without small details, such as symbols, shapes, and geometric designs. Alternatively, DTF printing works well with details as it doesn’t require separate layers for design elements or colors. DTF printing also doesn’t require a specially-made mesh screen for each design, just a printer, transfer film, printing powder, and a heat press.
Direct-to-film vs. direct-to-garment printing
In simple terms, direct-to-garment printing (DTG printing) works by spraying ink directly onto fabric. However, before any ink can be sprayed, a pre-treatment solution has to be applied to the fabric. After the solution is added, the DTG printer sprays the water-based inks onto the garment. The ink gets soaked into the fabric fibers, and after, the design is cured to boost print quality.
DTG printing works mainly on cotton blends and is best suited for 100% cotton products. So if you’re interested in selling mostly cotton-based apparel, this is ideal. If you’d like to be able to scale your product offering to include products made of different types of fabrics, you’ll want to consider including or using the DTF print technique as well.
Direct-to-film vs. sublimation printing
Sublimation printing has experienced rapid growth over the past few decades. It’s one of the most popular methods out there and works by printing artwork into fabric from seam to seam.
Sublimation printing takes a long time to do though. Designs are printed on special paper that gets fed into a heat press machine, then heat is used to bind the ink to the garment.
Sublimation is a technique that’s suitable for printing on different types of polyester, like polymer-coated fabric and polyester fabric blends. This printing technique is also used for other types of products including mouse pads, mugs, and blankets.
If you plan to eventually expand your product catalogue to include a variety of fabric blends, you’ll want to consider including DTF printing alongside sublimation. With DTF printing, you can make the most of various fabric types and not rely completely on polyester-blends.
Direct-to-film printing at Rebel Printerz
We want to provide the best experience for our customers, so at the moment we’re still exploring DTF printing as a standalone technique.
Once we’ve perfected the process, we’re looking forward to opening up a range of products using this technique.
How to prepare a print file for direct-to-film printing
To ensure your DTF print quality turns out well, check out our suggestions below.
File type and graphics resolution
It’s best to use a PDF file with a transparent background. Make sure it has a resolution of at least 150 to 300 DPI to create a nice, crisp final design.
We strongly advise against semi-transparencies as they don’t produce good quality prints for DTF printing. Quality issues happen because the edge of a design is more visible on the final print, making the halftone effect dotted and fuzzy.
Colours and the colour gamut
We print using the CYMK PSO V3 colour gamut. When it comes to print performance on the final product, CMYK colours appear more saturated.
Please keep in mind that neon colours may come out looking a little different once printed when using DTF printers. This is because, if you submit a file with very neon or saturated colour profiling, the printer will select the closest available coloured pigment.
We suggest using the latest sRGB colour profile. The specific profile we recommend is sRGB IEC61966-2.1. Why? CYMK files are large and need to be processed with advanced graphics software, which can be difficult to run. Meanwhile, sRGB colour profiles are easier to run and one of the most commonly used colour profiles used in design printing.
Now you know everything about direct-to-film printing
DTF printing is a great choice for designs that include intricate details and different elements. Plus, it’s a versatile print method that can be used on a variety of fabrics for vibrant designs that are sleek and resilient.
If you’re interested in a printing technique that’ll allow you to expand your product offering, you should consider using DTF printing. Register to stay updated on when our products will be available to design using this new technique