Using the right type of ink in the tagless printing process significantly improves the quality and durability of the print. The ink for tagless printing consists of critical components that are essential for delivering a perfect print. Furthermore, ink components are added to enhance its usability. For these reasons, it is important to fully understand the ink to deliver durable, vibrant prints.

tagless printing ink


Tagless pad printing works the same way as any other pad printing process. Pad printing is the process of transferring a 2-dimensional image onto a part or a substrate. This printing process works for both two-dimensional and three-dimensional objects. It is important to note that this process utilizes a pad printer machine to label garments.

A pad printer has several critical components that enable it to deliver a print. These components are:

  • Pad printing plate (cliché)—it holds the artwork for printing on the garment.
  • The pad printing ink cup assembly (which has a cup and an ink cup ring) acts as the ink reservoir. Additionally, the ink cup ring removes the excess ink from the etch.
  • The silicone pad printing pad picks up ink from the etched plate and transfers it to the garment.

Each new design requires a new plate. It is also important to note that if an artwork has multiple colors, each color requires an additional etched plate.

There are two types of tagless printing processes. These are the tagless screen printing process and the tagless pad printing process. To get an excellent print, it is important to use the right garment printing ink for each type of printing application.

The pad printing process uses a solvent-based pad printing ink—the Natron ST Series. The ST series, which is our standard tagless pad printing ink, is available in a wide range of colors. In cases where you need to print high-opacity prints, we recommend screen printing with the SilTex HD Series and the S150 screen printing machine. This printing process delivers high-opacity colors.

The SilTex silicone screen printing ink uses a different catalyst and solvent than the ST Series ink. Additionally, these inks offer high flexibility, and they never fade or crack. SilTex silicone inks offer maximum durability!


All about pad printing ink - ST Series for apparel printing
pad printing consumables - solvents


Both silicone-based and solvent-based inks require a solvent to alter the ink’s viscosity during the printing process. There are different solvents that evaporate at different rates, from fast to slow.

During the screen and pad printing process, the solvent evaporates, leaving only the solids (pigments, binders, and resins) on the substrate. Therefore, it is very important to select the right solvent for your specific ink series and the printing environment.


Most people confuse hardener with a catalyst. A hardener hardens the ink, while a catalyst vulcanizes the ink. Hardener is to solvent-based ink what a catalyst is to silicone ink.

Both catalyst and hardener help the ink crosslink with the substrate. Additionally, hardeners and catalysts enhance print durability, which is critical for tagless printing.

Labels printed with SilTex HD and ST Series will last beyond 50 industrial wash cycles.

industrial pad printing supplies - pad printing hardener (catalyst)
S150 Screen printing machine for tagless


One of the major advantages of tagless garment printing is that the ink dries to touch instantly. For this reason, it is possible to print a large volume of garment labels without smudging the prints. While the ink dries instantly, the crosslinking takes 24–36 hours—the full cure of the ink. To do adhesion testing, we recommend waiting a full 24 hours before attempting to wash the garments.

For screen printing tagless labels with silicone inks, we recommend using a dryer system. Silicone inks dry for 30 seconds and achieve full cure in 60 seconds.


There are several important safety standards that garments and tagless printing inks should meet. These are CPSIA, Prop 65, NAMSA certification for skin irritation, and Oeko Tex Eco-Passport. Oeko Tex covers the harmful effects on humans and the environment.

Lastly, there is the RSL certification by the large garment manufacturers.

Therefore, it is important to have safe inks when pad printing or screen-printing tags on t-shirts and garments.

Tagless pad Printing Ink

There is no difference between pad printing a plastic and pad printing a t-shirt which requires a tagless pad printing ink. As discussed in our previous article what is tagless printing? Tagless pad printing is the process of transferring a image (two dimensional) onto a garment. In essence, you are labeling a textile.

To achieve this, you need a pad printer machine, a printing plate, or cliché, to hold the artwork, a printing pad to transfer the image from plate to the garment, and an ink cup for the ink mixture. The ink cup slides over the etched image on the plate plate and leaves a small amount of ink. The pad then picks up the ink from the etch and transfers it on to the garment. For each new logo, a new plate with the image must be made. In addition, for each additional color, and additional plate is required.

What is tagless pad printing?

To get the perfect print, a perfect tagless printing ink is key. The ink has to:

The ST Series is the perfect ink for tagless printing. The Natron™ ST series ink raises the bar. All colors in this series are opaque. Additionally this tagless printing ink line is available in a wide range of colors. There is no challenge of printing on dark garments. Competing inks require a system to achieve high opacity, which is costly.  Prints from S150 tagless screen printing machine offers a highly opaque print to stand out on any garment.

The Natron ST Series ink.

Skip the magic and print. Competing inks use heated pads to transfer an image to a textile. Pad printers equipped with this technology is not only costly but also environmentally unsustainable. Pad printing machines equipped with this heating technology uses a lot heat. The ST Series come ready to print on dark substrates without heat. These inks can be screen or pad printed. No magic tricks. Plug the ST tagless printing inks and print. These inks are also flexible.

The ST series inks is a 2-component ink. The ST ink require a hardener/ cross linker which makes the prints hold for the life of the garment.

Check out this article clothing tags why they exist?

Natron ST tagless pad printing ink availability:

These inks are also available out side USA in the following countries

Buy Now: Tagless Pad Printing Ink

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