Pad Printing Services for Complex and Irregular Surfaces

What UPI’s Pad Printing Process Handles

Material and surface geometry are the two variables that define whether a pad printing job is feasible and where most vendor conversations break down.

Substrates: Plastic, Metal, Glass, Silicone, and More

We run pad printing on a broad substrate range, including:

• Plastics, including ABS, polycarbonate, polystyrene, polypropylene, polyethylene, nylon, acrylic, PVC, kydex, and soft-touch elastomers
• Metals, including fabricated steel, aluminum, and coated metal components
• Glass and ceramics
• Silicone and rubber-based materials
• Painted and powder-coated surfaces
• Wood and wood composite surfaces

Ink selection is matched to the substrate and validated through adhesion testing before full production runs begin. The goal is permanent adhesion.

Surface Types: Curved, Contoured, and 3D Geometries

Beyond material compatibility, the process is designed to follow the part instead of forcing the part to fit the process.

The silicone pad at the heart of this process deforms to match a part’s surface during transfer, then releases cleanly without distorting the image. That makes it well-suited for:

• Concave and convex profiles
• Cylindrical and tubular forms (including full-wrap rotational printing)
• Recessed and raised surface areas
• Multi-location printing on a single part in one pass

Parts with tight imprint areas or complex geometry are where our custom-engineered tooling makes a difference. Fixtures are designed and built in-house to hold parts consistently across long production runs.

Substrate range is only part of the picture. How ink performs on that substrate is where custom pad printing quality is actually won or lost.

Ink Adhesion, Color Matching, and Resolution

Our pad printing process supports single-color through multi-color work, with tight registration across all passes. Key capabilities include:

• Multi-color registration for complex artwork, and fine-detail graphics
• In-house color matching against Pantone standards
• High-resolution output on irregular and contoured surfaces where screen printing is not geometrically feasible
• Fast ink cure times that allow multiple colors to be applied to the same part in a single production cycle
• Medical-grade inks – biocompatible, sterilization-resistant formulations for healthcare applications

We also offer surface pre-treatment for substrates that need improved adhesion before printing

ISO 9001:2015 Quality Controls

UPI is ISO 9001:2015-certified and FDA-registered for medical device manufacturing. Our quality processes are documented, auditable, and consistently applied across jobs. From artwork review and pre-production sign-off through final inspection, every part is checked before it ships. For regulated industries, that traceability matters.

Industries Served

The industries we work with have different marking standards, regulatory requirements, and substrate profiles. Each shapes how we set up the job.

• Medical devices: Catheters, syringes, housings, and diagnostic equipment requiring biocompatible inks, sterilization resistance, and precise, legible markings for regulatory compliance
• Injection-molded parts: Logos, identification text, and multi-color graphics on polycarbonate, polypropylene, and other molded resins
• Metal fabricators: Durable markings on fabricated steel and aluminum components for industrial identification and branding
• Promotional and commercial products: Custom graphics on pens, tools, housings, and display components where print quality and adhesion durability are required

UPI also serves blow molders, roto molders, 3D printing operations, and store display manufacturers with precise, durable decoration for finished parts.

Value-Added Services Paired With Pad Printing

Pad printing is often one step in a larger production sequence. UPI is set up to handle what comes next.

Assembly, Packaging, and Kitting

Once pad printing is complete, we can move directly into:

• Assembly of printed components into sub-assemblies or finished products
• Packaging and kitting for distribution-ready shipment
• Laser engraving or hot stamping where the application calls for a different marking method alongside pad print

Keeping multiple finishing steps under one roof reduces handoffs, simplifies scheduling, and maintains consistent quality control throughout the process.