Pad Printing Process Guide: Plates, Inks, Pads and Production Runs
March 29, 2026
Pad printing runs on four parts working together: an etched plate (the cliché) that holds the image, an ink cup that fills it, a silicone pad that picks the image up, and a fixture that holds your part in the same spot every time. Get those four right and you can print thousands of identical marks on curved or uneven parts. This guide covers how each one works and what it means for your order.
What is a cliché plate?
The cliché is a flat steel or polymer plate with your artwork etched into it, usually a few microns to about 25 microns deep. The etch depth controls how much ink transfers. Polymer plates are cheaper and fine for short runs. Steel plates cost more and last for very long runs.
How does the ink get onto the plate?
Most modern machines use a sealed ink cup. The cup slides over the plate, fills the etched area, and its ceramic ring wipes the surface clean on the way back. Sealed cups keep solvent from evaporating, which keeps color and viscosity steady across the run.
Why does the pad shape matter?
Pads come in round, loaf, square and custom shapes and in different hardnesses. A rounded pad rolls air out as it touches down, which prevents voids. A softer pad wraps deeper curves. A harder pad holds finer detail. Picking the pad is half the setup.
How does the ink stick?
As the pad lifts the image, a thin layer of solvent evaporates and the ink turns tacky. That tack makes it let go of the pad and grab the part. The ink is chosen for the material:
- Solvent inks for most plastics
- Two-part epoxy inks for metal, glass and chemical resistance
- UV-curable inks for fast curing
- Silicone inks for silicone rubber
How do multi-color jobs work?
Each color gets its own cliché area and pad, printed in sequence. Multi-station machines or shuttle setups move the part between colors, and the fixture keeps registration tight.
What drives pad printing cost?
| Cost driver | Why |
|---|---|
| Number of colors | One plate area, pad and pass per color |
| Fixture | Unusual parts need a custom holder |
| Ink type | Two-part and specialty inks cost more and need curing |
| Quantity | Setup is spread across the run |
FAQ
What is a cliché in pad printing?
The etched plate that holds the artwork and ink before the pad transfers it.
How long does pad printing setup take?
Plate making and fixture setup usually take a few days. After that, production runs fast.
Why does a pad print have voids or pinholes?
Usually the wrong pad shape or hardness, trapped air, or ink that's too dry. A test print catches it.
Can pad printing match my brand color?
Yes. Inks are mixed to Pantone references.
For a broader overview, read pad printing capabilities and materials. Then see pad printing pricing, call (205) 326-6540 or request a quote online.