High contrast

White Ink Metal RFID Cards

White ink is the clearest print route on matte black, gunmetal, carbon, and other dark metal faces — an opaque layer that gives critical data and branding full contrast without losing the restraint of the base finish. Its real limits are size and distance, and both are approved by scanning a physical sample.

Production detail views

Four white ink references for planning the finished metal card.

Crisp geometry, fine registration stripes, contrast pairs, and a data-matrix zone — white ink at work on dark metal.

Black card with crisp white geometric ink

Thin white registration stripe on black metal

Two black cards showing white-ink variations

High-contrast data-matrix zone on dark metal

The scan test sets the size limit, not the artwork file.

White is the workhorse on dark metal: the only print route that holds full contrast on matte black, gunmetal, and carbon faces. The practical limits are size and distance — the smallest text and the QR zone are approved by scanning a physical sample at the real working distance, because a code that scans at arm's length on screen can fail at a gate.

Prove visual and technical performance together.

Approve opacity, smallest readable data, QR scan distance, and edge sharpness on the final metal surface.

Best uses

High-contrast logos, QR codes, serials, member names, access instructions, and dark-finish data zones.
Premium metal card programs where the finish, data zones, and RF construction need coordinated approval
Projects with a defined artwork file, variable-data need, and reader or scan validation route

Frequently asked questions

How small can white-ink text and QR codes be?

Small enough for serials and dense QR zones — but the real limit is set by scanning the physical sample at working distance, and that check is part of every white-ink approval.

Which finishes need white ink?

The dark ones: matte black, gunmetal, and carbon faces, where any other print route loses contrast. On pale metal, white ink becomes a subtle accent rather than the data carrier.

Does white ink affect the RFID construction?

No — it is a surface layer. The QR panel's position is planned with the artwork so codes sit clear of edge treatments and stay scannable on the finished, reader-tested card.

Specification

Format	CR80 85.6 x 54 mm by default; custom outlines after RF review
Thickness	0.3 mm to 0.8 mm depending on construction
Minimum order	None — single samples to production runs
Production time	About one week after artwork and sample approval
RF construction	Antenna, ferrite or hybrid shielding, chip, metal faces, and edge stack specified together
Chip routes	NFC tag, standard HF, high-security AES HF, LF compatibility, and selected UHF by reader test
Marking options	Laser etch, deep engraving, UV print, white ink, enamel fill, QR, serial, and controlled cut-through
Approval flow	Finish sample, encoded working sample, reader check, pre-production approval
Primary route	White ink
Best use	High-contrast logos, QR codes, serials, member names, access instructions, and dark-finish data zones.
Approval check	Approve opacity, smallest readable data, QR scan distance, and edge sharpness on the final metal surface.