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8.12.1 Permeation time according to EN 374-3
The EN 374-3 standard pertains to determining the resistance pro-
vided by the material of protective gloves against the permeation
(permeation) of nongaseous, potentially hazardous chemicals
when subjected to continuous contact.
For each chemical, the combinations of protective glove/test
chemical are classified according to their penetration time in which
the glove prevents permeation.
The protection index indicated is based on the penetration time
determined during constant contact with the test chemical under
customary laboratory conditions as specified in EN374-3. The ac-
tual duration of protection at the workplace may deviate consider-
ably from this protection index.
EN 374-3 Specification of the results:
Assuming permeation takes place, the penetration time is given in
minutes for each test sample. The average penetration time for
each type of material is also indicated. The duration of testing is
given if no penetration occurs.
This means that when the user is constantly exposed to the chem-
ical it takes a minimum of 1 µg / minute x cm² to permeate the
glove and come into contact with the user's skin.
Standard Norm E 374 divides gloves into six classes, Class 6 be-
ing the highest and most resistant. During testing, the glove is
completely immersed in the medium. No documentation of resis-
tance of > 480 min. takes place.
Protection Index
Class 1
Class 2
Class 3
Class 4
Class 5
Class 6
> 10 min-
utes
> 30 min-
utes
> 60 min-
utes
> 120
minutes
> 240
minutes
> 480
minutes
For exam-
ple:
For exam-
ple:
For exam-
ple:
For exam-
ple:
For exam-
ple:
For exam-
ple:
…
…
…
…
…
…
Acetone
Benzalde-
hyde
Napthabe
nzene
n-heptane Isooctane Formic
acid, 10%
Benzene
Nitroben-
zene
Anilene
Ethyl alco-
hol
Ethylene
diamine
Ammonia,
10%
1
2
3
4
5
6
7
8
9
A