ASTM D1650-91

ASTM D1b50 93 m 0759530 0070913 b m
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AMERICAN SOCIETY FOR TESTING AND MATERIALS
4CTb Designation: D 1650 - 91
i916 Race St Philadelphia, Pa 19103
Reprinted from the Annual Book ofASTM Standards. Copyright ASïM
If not lkted in the current combined Index, will appear in the next edition.
Standard Test Methods of
Sampling and Testing Shellac Varnish‘
This standard is issued under the fixed designation D 1650; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, theyear of 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 ments and procedures for characterizing shellac.
4.2 All shellac varnishes should be tested by the proce-
1. 1 These test methods cover procedures for the sampling
dures contained in these test methods.
and testing of orange shellac and bleached lac varnishes.
1.2 The sampling procedures and methods of test appear
SAMPLING
in the following order:
Sections
5. Procedure
Sampling 5
5.1 A single container shall be taken at random from each
for Test Mcthods:
General Requirements
Purity of Reagents 6
lot as representative of the whole.
Preparation of Sample I
5.2 In case the varnish is packaged in cans or drums of 5
Color 8 to 11
gal (18.9 L) or more capacity, thoroughly mix the contents of
Drying Time 12 to 14
Nonvolatile Matter 15 to 17 the container and take a number of small samples from the
iodine Value 18 and 19
top, bottom, and intermediate points by means of sampling
Insoluble Matter 20 to 23
tube. Mix these small samples to form a composite sample
Wax 24 fo 21
Ash 28 and 29 and transfer not less than 1 qt (0.94 L) to a cleap, dry, glass
Purity 30 to 34
bottle, securely stopper with a new clean cork or well-fitting
Acid Value 35 to 37
cover or cap, seal, distinctly label, and transmit to the
Saponification Value 38 to 40
laboratory for test.
1.3 This standard does not purport to address the safety
5.3 When the varnish is packaged in containers of 1 gal
problems associated with its use. It is the responsibility of the
(3.8 L) or less capacity, send the original unopened container
user of this standard to establish appropriate safety and
to the laboratory for test. When this cannot be done,
health practices and determine the applicability of regulatory
thoroughly mix the contents of the container and transfer
limitations prior to use.
not less than 1 qt to a clean, dry, glass bottle, securely stopper
with a new clean cork or well-fitting cover or cap, seal,
2. Referenced Documents
distinctly labeI, and transmit to the laboratory for test.
5.4 Take precautions to ensure that the sampling appa-
2.1 ASTM Standards:
ratus and the samples themselves are neither contaminated
D 29 Test Methods of Sampling and Testing Lac Resinsz
with nor altered by any material not representative of the lot
D 1193 Specification for Reagent Water3
being sampled.
3. Terminology
Test Methods
3.1 Description of Terms Specific to This Standard:
3. I. 1 acid value-the number of milligrams of potassium
GENERAL REQUIREMENTS
hydroxide required to neutralize 1 g of the nonvolatile
portion of the lac varnish.
6. Purity of Reagents
3.1.2 lot-For purpose of sampling, a lot shall consist of
6.1 Reagent grade chemicals shall be used in all tests.
the entire amount of varnish manufactured as one batch and
Unless otherwise indicated, it is intended that all reagents
offered for delivery at one time.
shall conform to the specifications of the Committee on
3.1.3 saponijlcation value-a measure of the alkali reac-
Analytical Reagents of the American Chemical Society,
tive groups in lac resins, it is expressed as the number of
where such specifications are a~ailable.~ Other grades may be
milligrams of potassium hydroxide that react with 1 g of the
used, provided it is first ascertained that the reagent is of
nonvolatile portion of the lac varnish.
sufficiently high puritxto permit its use without lessening the
accuracy of the determination.
4. Significance and Use
6.2 Unless otherwise indicated, references to water shall
4.1 These test methods compiles the common measure-
be understood to mean reagent water conforming to Specifi-
cation D 1193, Type IV.
I These test methods are under the jurisdiction of ASTM Committee D-1 on
Paint and Related Coatings and Materials and are the direct responsibility of
Subcommiiice W1.33 on Polymers and Resins.
“Reagent Chemicals, American Chemical Socicty Specifications,” Am. Chem.
Current edition approved Feb. 22, 1991. Published April 1991. Originally Soe., Washington, DC. For suggestions on the testing of reagents not listed by the
published as D 1650 - 59. Last previous edition D 1650 - 76 (1981).
American Chemical Society, see “Reagent Chemicals and Standards,” by Joseph
Annital Book of ASTMSlandards, V
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