16 CFR § 1615.3 - General requirements.
---
identifier: "/us/cfr/t16/s1615.3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "16 CFR § 1615.3 - General requirements."
title_number: 16
title_name: "Commercial Practices"
section_number: "1615.3"
section_name: "General requirements."
chapter_name: "CONSUMER PRODUCT SAFETY COMMISSION"
subchapter_number: "D"
subchapter_name: "FLAMMABLE FABRICS ACT REGULATIONS"
part_number: "1615"
part_name: "STANDARD FOR THE FLAMMABILITY OF CHILDREN'S SLEEPWEAR: SIZES 0 THROUGH 6X (FF 3-71)"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
regulatory_source: "40 FR 59903, Dec. 30, 1975, unless otherwise noted."
cfr_part: "1615"
---
# 1615.3 General requirements.
(a) *Summary of test method.* Five conditioned specimens, 8.9 × 25.4 cm. (3.5 × 10 in.), are suspended one at a time vertically in holders in a prescribed cabinet and subjected to a standard flame along their bottom edge for a specified time under controlled conditions. The char length is measured.
(b) *Test criteria.* The test criteria when the testing is done in accordance with § 1615.4 *Test procedure* are:
(1) *Average char length.* The average char length of five specimens shall not exceed 17.8 cm. (7.0 in.).
(2) *Full specimen burn.* No individual specimen shall have a char length of 25.4 cm. (10 in.).
[40 FR 59903, Dec. 30, 1975, as amended at 43 FR 4853, Feb. 6, 1978]