Specification
What has to go in the finishes schedule
A designer specifying a reception, a boardroom and eighty task chairs is not buying
fabric. They are filling in a schedule, and every empty cell in that schedule is a
question they will be asked at sign-off. The three that come up first are abrasion,
fire, and whether the cloth can be got again.
Abrasion is measured by the Martindale method. A circular specimen is rubbed against a
standard abradant in a widening figure-of-eight until two threads break; the rub count
at that point is the figure quoted. ISO 12947-2 is the test that determines specimen
breakdown, and the bands below are how the resulting number is normally read.
Treat a rub count as a comparative indicator of wear, not a warranty. It says nothing
about pilling, seam slippage, soiling or how the colour will hold under a south-facing
window. Those are separate questions, and they belong in the schedule too.