Pendulum Impact Tests
Impact testing uses a 100 pound bag of lead shot dropping against a 76 x 34 inch piece of glass. The film passes if there are no holes large enough to let a 3 inch ball pass through when the glass breaks. The glass and film are subjected to increasing forces as created by the following drop heights:
12" (1 foot) = 100 ft./lbs
18" (1.5 feet) = 150 ft./lbs
48" (4 feet) = 400 ft./lbs
This test uses 12, 18 and 48 inch drops. All samples are first struck from a 12 inch drop. If the glass does not break it is restruck from a series of increasing heights until the glass breaks. A pass is based on the way the glass breaks, not at what level the glass breaks
16 CFR 1201 (Code of Federal Regulations–US Government Standard)
This test includes drops from 18" for category 1 and 48" for category 2. Thesese tests are done on both the inside and outside of the glass and film combination.
This test is basically the same test as 16 CFR 1201, except three impact levels are tested:
Class C-12" Class B-18" Class A-48"
Abbreviations and Test Standards
AIMCAL - Association of Industrial Metallizers, Coaters and Laminators
ANSI - American Nationnal Standards Institute
ASHRAE - American Society of Heating, Refrigeration and Air Conditioning Engineers
ASTM - American Standard Test Methods
IWFA - International Window Film Association
NFRC - National Fenestration Rating Council
BS - British Standards
ANSI Z97.1 Human Impact Test - American National Standard Institute safety test desgined to simulate a human walking through a glass window. A 100lb bag of lead is dropped against a piece of glass attached to a framing system.
Dade County Protocol - Hurricane test developed after Hurricane Andrew in Florida designed to analyze how well a glazing system holds up against impact from wind-borne debris and wind-load pressure.
Glass Hazard Mitigation - the term used to describe the level of glass protection provided by window film or a glazing system.
Mechanical Retention System - a procedure where security film is applied to a window and anchored to the framing system through an attachment system.
Millimeter or "mil" - window film thickness levels are often described in mils. A unit of length equal to one thousandth of an inch. Standard solar control films are approximately 1.5mil. Safety & Security films range from 2mil. all the way up to 12 mil.
Taber Abraser Test - a hardcoat test using a Taber Abraser machine to determine scratch resistant levels of safety & security films.
Wet Glaze Retention System - a procedure where security film is applied to a window and secured to all four sides of the framing system using special sealants.