Authentication only works if it lasts. A tag that degrades, peels, or loses its signal after a few wash cycles isn't a security solution, it's a liability. That's why we don't just claim DUST is durable. We test it.
Here's what that looks like in practice.
Putting DUST Through the Wringer
We recently ran a rigorous wash and abrasion protocol on heat-transfer labels coated with DUST Identity nanodiamond ink. The goal was simple: find out where, if anywhere, the signal breaks down.
Fourteen samples were prepared - ranging from a pristine control to specimens put through 50 full wash-and-dry cycles. Each sample was scanned before application, scanned again after application, and then scanned at every meaningful interval in between: 1, 3, 5, 10, 20, 30, 40, and 50 washes.
Nothing was skipped. Nothing was averaged away.
What "50 Washes" Actually Means
This wasn't a gentle rinse. The laundering parameters were designed to reflect real consumer conditions:
- Wash temperature: ~40°C with powder detergent, high spin
- Dry temperature: ~45°C tumble dry
- Cycle: wash, dry, repeat — 50 times over
For context, 50 wash cycles is the industry benchmark for garment label durability. It's the threshold most apparel brands use to evaluate whether a care label will last the life of the product. We used it as our floor, not our ceiling.
We also tested a deliberately over-applied sample — higher heat, higher pressure, longer dwell time — to understand how the tag behaves under stress conditions that would challenge any ink or adhesive system.
Abrasion Testing, Too
Wash cycles test one axis of durability. Abrasion tests another. A separate sample was run through Taber abrasion testing, with DUST scans taken at 100, 500, 1,000, 2,000, 5,000, and 10,000 cycles.
Ten thousand abrasion cycles. That's not a product sitting in a display case — that's a component being handled, rubbed, scratched, and flexed over years of real-world use.
Why This Matters for Authentication
The whole premise of physical authentication is that the identifier and the object are inseparable. If a DUST tag degrades to the point where it no longer produces a reliable scan, it stops being an authenticator and becomes just another label.
This testing protocol was designed to stress every layer of that premise. The nanodiamond particles in DUST ink aren't placed on top of the substrate — they're embedded within it. Diamonds don't dissolve in detergent. They don't soften at 45°C. They don't abrade away like dye or foil.
The scanning results tell you whether the signal survives. The test design tells you whether you can trust the results.
What We're Looking For
DUST tags are read using our DICE platform, which captures the unique spatial signature of the nanodiamond particles — a signature that's physically unclonable and tied to that specific item. A successful scan after 50 washes means the particles are still there, still in the right configuration, still readable.
A match at wash 50 is the same match at wash 1. That's the standard.
The Bottom Line
DUST isn't a coating that wears off or a barcode that fades. It's a physical signature embedded in the material itself — and this testing protocol was built to prove exactly that.
Results from this work are part of our ongoing validation library. If you're evaluating authentication solutions for textiles, apparel, or any application where durability is non-negotiable, we're happy to walk you through the data.
