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# ASTM International - ASTM D1076-15

## Standard Specification for Rubber—Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex

inactive
 Organization: ASTM International Publication Date: 15 December 2015 Status: inactive Page Count: 13 ICS Code (Latex and raw rubber): 83.040.10
##### significance And Use:

4.1 This specification denotes limits on the 4 categories of latex as defined in the scope and defines the test methods to use for the specified properties. These test methods may be used for... View More

##### scope:

1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following categories:

(A) Dry rubber content by definition and use is the acid coagulable portion of latex after washing and drying.(B) It is accepted that KOH numbers for boric acid preserved latices will be higher than normal, equivalent to the amount of boric acid in the latex.(C) Blue or gray color usually denotes iron contamination caused by improper storage in containers.

Category 1-Centrifuged Hevea natural latex preserved with ammonia only or by formaldehyde followed by ammonia.

Category 2-Creamed Hevea natural latex preserved with ammonia only or by formaldehyde followed by ammonia.

Category 3-Centrifuged Hevea natural latex preserved with low ammonia with other necessary preservatives.

Category 4-Centrifuged, or centrifuged and creamed, guayule latex, or other natural rubber latex, containing less than 200 µg total protein per gram dry weight of latex, with ammonia or other hydroxide, with other necessary preservatives and stabilizers.

Category 5-Centrifuged Hevea natural latex treated with aluminum hydroxide or by other means, preserved with ammonia only or by formaldehyde followed by ammonia containing less than 0.5 % non-rubber content.

1.2 This specification is not necessarily applicable to latices prepared or preserved by other methods, and shall not be construed as limiting the desirability or usefulness of other categories of latices. It does apply to natural latex sources other than Hevea brasiliensis but does not apply to compounded latex concentrates.

1.3 The analytical procedures applicable to the specifications are included and appear in the following order:

 Section Sampling 6 and 7 Total Solids 8 Dry Rubber Content 9 Protein Content 10 Total Alkalinity 11 Viscosity 12 Sludge Content 13 Coagulum Content 14 KOH Number 15 pH 16 Mechanical Stability 17 Copper and Manganese 18 Density 19 - 31 Volatile Fatty Acids 32 - 36 Boric Acid 37 Dry Films 38 Precision for All Test Methods 39

1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

##### abstract:

This specification establishes the requirements for first grade concentrated natural rubber latex of the following categories: Category 1, centrifuged Hevea natural latex preserved with ammonia... View More

### Document History

June 1, 2021
Standard Specification for Rubber-Concentrated, Ammonia Stabilized, Creamed, and Centrifuged Natural Latex
1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following categories: Category 1-Centrifuged Hevea natural latex stabilized with...
June 1, 2020
Standard Specification for Rubber—Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following categories: Category 1—Centrifuged Hevea natural latex preserved with...
ASTM D1076-15
December 15, 2015
Standard Specification for Rubber—Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following categories: (A) Dry rubber content by definition and use is the acid...
July 1, 2014
Standard Specification for Rubber—Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following categories: (A) Dry rubber content by definition and use is the acid...
October 1, 2010
Standard Specification for Rubber-Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following categories: Category 1 Centrifuged Hevea natural latex preserved with...
June 1, 2006
Standard Specification for Rubber-Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following categories: Category 1-Centrifuged Hevea natural latex preserved with...
August 10, 2002
Standard Specification for Rubber-Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following types: Type 1-Centrifuged natural latex preserved with ammonia only or by...
February 10, 1997
Standard Specification for Rubber-Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
1.1 This specification covers requirements for first grade concentrated natural rubber latex (see Table 1) of the following types: Type 1-Centrifuged natural latex preserved with ammonia only or by...