When it comes to creating custom bricks and parts, the printing method you choose makes all the difference. Two of the most common techniques are pad printing and UV/digital printing. While both can put designs onto bricks, the results, durability, and production processes vary significantly.
In this post, we’ll break down the differences between pad printing and UV/digital printing so you can understand why pad printing remains the gold standard for professional-quality custom parts.
What is Pad Printing?
Pad printing is the same technique The LEGO Group uses on official minifigures and bricks. It involves transferring ink from a silicone pad onto the curved or flat surface of a brick or tile. Each color is applied one layer at a time, using precise machines that ensure alignment, vibrancy, and detail accuracy.
Because the ink is formulated specifically for ABS plastic, it bonds and cures directly to the part, becoming a permanent part of the piece itself.
What is UV/Digital Printing?
UV or digital printing uses a flatbed printer that sprays liquid ink directly onto the surface of a part. The ink is then cured instantly with ultraviolet light, creating a layer of print that “sits” on top of the plastic.
This method allows for quick, small-batch designs and even full-color gradients. However, since the ink doesn’t chemically bond with the plastic, it can chip, scratch, or fade over time.
Key Differences in Production
- Durability:
- Pad Printing: Inks are designed to adhere to ABS plastic permanently, making them non-toxic, scratch-resistant, and long-lasting.
- UV Printing: Prints can wear down or peel with frequent handling since the ink forms more of a surface coating.
- Appearance:
- Pad Printing: Produces sharp, vibrant colors with an authentic “factory” look.
- UV Printing: May look slightly raised or glossy compared to the standard matte finish, making it less seamless.
- Production Volume:
- Pad Printing: Best suited for medium to large production runs. Each setup requires specialized plates and alignment, so it’s ideal when you want consistent, professional results across hundreds or thousands of pieces.
- UV Printing: Allows for one-off or very small-batch runs, but sacrifices durability and quality.
Why Pad Printing Wins for Custom Creations
At the end of the day, if you want the highest-quality custom printed bricks that look and feel like they came straight out of the factory, pad printing is the way to go.
- Inks fully bond to the ABS plastic, curing for maximum strength.
- The results are non-toxic, safe for play, and built to last.
- Prints won’t scratch off, even with years of use.
While UV/digital printing has its place for quick prototypes or very short runs, pad printing remains the superior choice for collectors, businesses, and enthusiasts who demand factory-quality results.
At Brick Works, we specialize in professional pad printing for all our custom projects. Whether you’re creating corporate gifts, promotional items, or your own branded building kits, we ensure every part meets the highest standard of quality and durability.