Standard Test Methods of
Sampling and Testing Pulps to be Used in the Manufacture
of Electrical Insulation1
This standard is issued under the fixed designation D 3376; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 These test methods cover the sampling and testing of
cellulosic pulps for use in the manufacture of electrical
insulating papers and boards or in the direct application of pulp
fibres as insulation to electrical conductors.
NOTE 1—The significance of any one pulp property test method, as set
forth herein, should be considered with discretion depending on the
product made from the pulp.
1.2 Sections on Reagents, Sampling, and Report are integral
parts of each of the individual test methods that follow.
1.3 Each test method is described as being a measure of
either a bulk property of the pulp or a property of a handsheet
formed from the pulp.
1.3.1 Bulk characteristics determinable by these procedures
appear in the following sections:
Procedure
Sections
ASTM
Method
Reference
TAPPI
Method
Reference
Aqueous Extract Conductivity 8 and 9 D 202 …
Aqueous Extract pH 10 and
11
D 202 …
Aqueous Extractable AcidityAlkalinity
12 and
13
D 202 …
Analysis of Ash for Cations by
Atomic Absorption Spectrophotometry
73-81 D 1193 and D 2576 …
Ash Content 82-85 D 202 T 413
Dirt in Pulp 42 and
43
… T 213
Fibre Analysis 24 and
25
D 202 and D 1030 …
Fibre Length of Pulp 44 and
45
… T 232,
T 233
Freeness (Canadian Standard
Freeness)
56 and
57
… T 227
Kappa Number/Permanganate
Number (Substances Oxidizable by Permanganate)
28 and
29
… T 236,
UM 251
Laboratory Processing of Pulp
(Beater Method)
54 and
55
… T 200
Moisture in Pulp 32-34 … T 210
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