Table 6 Classification of ticking according to 1632.6 of 16 CFR 1632 (16 CFR 1632 Standard for the flammability of mattresses and mattress pads [1991])

Class A

Three ticking prototypes tested directly over cotton batting on the test boxes and Three ticking prototypes tested over urethane foam covering the cotton batting on the test boxes

All six specimens meet the test criteria (char length < 2.54 cm (1 in), cotton batting does not ignite).

Acts as barrier against cigarette ignition.

May be used on any qualified mattress prototype without conducting new prototype test.

Class B

Three ticking prototypes tested over PUF covering the cotton batting on the test boxes

The three specimens tested over PUF meet the test criteria. One or more specimens tested over cotton batting do not meet the test criteria.

Has no effect on cigarette ignition.

May be used on any mattress prototype which was qualified with Class B or Class C without conducting new prototype tests.

Class C

Three ticking prototypes tested over urethane foam covering the cotton batting on the test boxes

One or more specimens tested over PUF covering cotton batting do not meet the test criteria.

Has the potential to act as a contributor to cigarette ignition.

Requires a new mattress prototype test before the ticking fabric is used in mattress production.