ASTM D1076-23 PDF

Full title and description

ASTM D1076-23 — Standard Specification for Rubber—Concentrated, Ammonia Stabilized, Creamed, and Centrifuged Natural Latex. Specifies categories and minimum quality requirements for first‑grade concentrated natural rubber latex and the analytical procedures used to verify those requirements (sampling, total solids, dry rubber content, protein, alkalinity, viscosity, sludge/coagulum, KOH number, pH, mechanical stability, metals, density, volatile fatty acids, boric acid, dry films).

Abstract

This specification establishes quality limits and test procedures for first‑grade concentrated natural rubber latex in multiple categories (centrifuged Hevea latex, creamed Hevea latex, low‑ammonia centrifuged latex, guayule or other natural latex, and certain aluminium‑treated latices). The standard provides analytical methods and acceptance criteria for chemical and physical properties used for production control and referee testing.

General information

• Status: Active.
• Publication date: 2023 (current designation D1076‑23; ASTM listing last updated Jun 16, 2023).
• Publisher: ASTM International.
• ICS / categories: 83.040.10 (Latex and crude rubber).
• Edition / version: D1076‑23 (latest revision).
• Number of pages: 14 pages.

Scope

Applies to first‑grade concentrated natural rubber latex of defined categories (centrifuged Hevea stabilized with ammonia; creamed Hevea stabilized with ammonia; centrifuged low‑ammonia Hevea; centrifuged/creamed guayule or other natural latex with low protein; and certain aluminium‑treated Hevea latices). The standard does not apply to compounded latex concentrates and includes the analytical procedures and sampling practices required to determine conformance with the specified limits.

Key topics and requirements

• Classification of latex into categories (Category 1–5) based on source and preservation/stabilization method (e.g., ammonia stabilization, low ammonia, aluminium hydroxide treatment).
• Mandatory analytical tests and acceptance criteria: total solids, dry rubber content, protein content, total alkalinity, viscosity, sludge and coagulum content, KOH number, pH, mechanical stability, copper and manganese content, density, volatile fatty acids, boric acid, and properties of dry films.
• Sampling procedures and precision statements for the test methods to support production control and referee testing.
• SI units as the standard reference; parentheses include non‑SI (informational) units.

Typical use and users

Used by latex producers, quality control and assurance laboratories, raw material purchasers, rubber and glove manufacturers, testing and certification bodies, and contract laboratories performing acceptance or referee testing on concentrated natural latex. The standard supports production control, incoming material inspection, and contractual specification between suppliers and buyers.

Related standards

Previous and related ASTM D1076 versions (for historical comparison) include D1076‑21, D1076‑15R20, D1076‑15, etc.; related test methods and material standards for rubber analysis and mechanical/property testing are referenced in the normative and informative sections of the specification. See the ASTM catalog entry for the documented revision history and Committee D11 development.

Keywords

natural latex, concentrated latex, ammonia stabilized, creamed latex, centrifuged latex, guayule latex, dry rubber content, total solids, protein content, mechanical stability, latex sampling, ASTM D1076

FAQ

Q: What is this standard?

A: ASTM D1076‑23 is the ASTM International standard specification that defines categories, quality limits, and required analytical procedures for first‑grade concentrated natural rubber latex (ammonia‑stabilized, creamed, centrifuged, and related classes).

Q: What does it cover?

A: It covers classification of latex types (Categories 1–5), sampling, and analytical methods with acceptance criteria for chemical and physical properties such as total solids, dry rubber content, protein, alkalinity, viscosity, sludge/coagulum, KOH number, pH, mechanical stability, certain metal contaminants, density, volatile fatty acids, boric acid, and dry film properties.

Q: Who typically uses it?

A: Producers of concentrated natural latex, raw‑material purchasers, glove and rubber product manufacturers, quality/control laboratories, and third‑party testing or referee labs use this standard for acceptance testing and production control.

Q: Is it current or superseded?

A: Current — the active designation is D1076‑23 (the 2023 revision). Users should verify in the ASTM catalog for any amendments or newer revisions before use.

Q: Is it part of a series?

A: Yes — it is part of the ASTM D1076 family of standards (historic and earlier revisions such as D1076‑21, D1076‑15R20, etc.); it is maintained by ASTM Committee D11 (subcommittee D11.22).

Q: What are the key keywords?

A: Natural latex, concentrated latex, ammonia stabilized, creamed latex, centrifuged latex, dry rubber content, total solids, protein content, mechanical stability, ASTM D1076.