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Eight instruments, and the failure each one predicts.

The lab exists to catch the failures that appear in year three. If a test cannot be tied to a field failure, we do not run it as routine.

AQL 1.00.4% claim rate1,240 lots retained

Laboratory

What each instrument is for.

Method and the failure it predicts — the two columns a QA auditor actually reads.

Instrument	Method	What it actually catches
Retroreflectometer	ASTM E810 · 0.2° / 0.33° / 1.0° observation	Any R_A deviation above 8% from the approved sample
Spectrophotometer	ASTM E1349 / E308, D65 10°	Colour outside the colour box — the usual reason a sign looks off next to the old one
Xenon-arc weathering	ASTM G155, 2,000 h	Yellowing and micro-cracking that show up in year three, not year one
Temperature / humidity	65 °C at 95% RH, 1,000 h	Adhesive that loses initial tack after a container crossing the equator
180° peel	ASTM D903	Winter de-lamination on cold-applied film
Salt spray	ASTM B117, 500 h	Corrosion at the edge of aluminium-backed product
Impact	ASTM D2794, 2 kg · 1 m	Film that survives the roll but not the sign shop
Low-temperature bend	−30 °C, 10 mm mandrel	Cracking when applied in a Nordic or Canadian winter

Traceability

A claim traced to a two-hour window.

Lot number → coating run → oven log → adhesive batch → slitting record → container number. In practice this is what shortens a dispute from six weeks to four days.

Lot number on the roll

Printed on the core and on the COA inside the container.

Coating run and oven log

Zone temperatures, line speed and UV dose for that run.

Retained sample

Stored at 23 °C / 50% RH for 36 months, indexed by lot.

Container number

Ties the shipment back to the slitting record and the roll.

Inspection

Sampling

ISO 2859-1

Inspection level

General II

AQL

1.0

Claim rate

0.4%

COA

Per shipment

Retained samples

36 months

Rejected lots are not re-graded and sold cheap.

Certificates & scope