Overview
Direct-to-Garment (DTG) printing is a digital printing technology that prints designs straight onto garments via specialized inkjet printheads. Equipped with a dedicated DT printhead and compatible DT fabric inks, xTool O1 Omni Printer delivers soft, high-resolution prints with intricate detail on cotton fabrics and apparel.
Read before you start
- Use garments with at least 50% cotton content for optimal print results. Other materials or thin fabrics may affect print quality. Ink may bleed through thin fabrics.
- Pretreatment solution helps improve ink adhesion to fabric. The color ink pretreatment solution is for light-colored garments, and the white ink pretreatment solution is for dark-colored garments.
- The recommended parameters are based on a 250 g T-shirt processed with xTool WonderPress. Parameters may vary depending on garment weight and the heat press or drying device used. Adjust the parameters as required.
- Before you start: 1) Wear nitrile gloves to avoid getting solution on your hands; 2) Wear a mask to avoid inhaling fumes or mist.
Preparations
- A heat press machine (xTool WonderPress used in this guide)
- Heat resistant sheet (included in xTool WonderPress package)
- xTool O1 Omni Printer (properly calibrated and ready for use)
- Garment tray
- White ink pretreatment solution (for dark-colored garments)
- Color ink pretreatment solution (for light-colored garments)
- Spray bottle
Steps
1. Prepare the garment
(1) Heat press the garment to make it wrinkle-free (recommended settings: 150°C, 5–10s, 50 kg pressure). Before heat pressing, place a heat-resistant sheet on the garment to prevent stains.

(2) Pour the pretreatment solution into the spray bottle. Dilute the color ink pretreatment solution with water at an approximate ratio of 1:19. The white ink pretreatment solution does not need dilution.

(3) Shake the pretreatment solution well and spray it evenly onto the target area on the garment.

- Recommended amount of diluted color ink pretreatment solution: 15-20 ml (full width)
- Recommended amount of white ink pretreatment solution: 20-25 ml (full width)
(4) Heat press the target area (recommended settings: 150°C, 60s, 50 kg pressure).

2. Load the garment and install the garment tray
(1) Put the garment on the garment tray (either on the surface of the tray or fitted over it). Ensure that the side sprayed with the pretreatment solution faces upward, and the collar of the garment is aligned with the raised part of the tray.

(2) Install the magnetic frame, ensuring the garment is smooth and wrinkle-free. Do not place the magnetic frame over seams or other raised areas of the garment, such as stitching.
(3) Keep any loose parts of the garment inside the baseplate to prevent them from getting caught in the printer.
(4) Place the garment tray onto the extension base. Specifically, hold the handholds on both sides, and place the tray steadily onto the extension base.
(5) Align the installation marks on both sides of the tray baseplate with the printer's side walls.
Then press down on the baseplate and release to secure the baseplate into the extension base.

3. Complete printing
(1) Press the Start/Stop button to feed the tray and extension base into the printer.
(2) Follow the instructions in the software to complete printing.
(3) Remove the tray from the printer and take out the finished garment.
4. Heat press
(1) Heat press the print area (recommended settings: 150°C, 60s, 50 kg pressure).

(2) After heat pressing is finished, pull out the base and remove the garment.

