GOST 25699.10-93 PDF

Full title and description

GOST 25699.10-93 — "Rubber compounding ingredients. Carbon black. Determination of sieve residue". This national standard specifies a wet-sieving test method to determine the mass fraction of sieve residue (fines/oversize) in technical carbon black used for rubber compounding.

Abstract

GOST 25699.10-93 defines apparatus, sampling and a wet-washing sieving procedure using controlled water pressure to pass a measured sample through specified mesh sizes, drying and weighing the retained fraction and calculating the mass fraction of residue. Typical parameters include specified sieve mesh sizes (nominal 45, 125 and 500 µm), controlled water pressure (≈0.2–0.3 MPa), sample masses (50 or 100 g depending on mesh) and drying at (105±2)°C (or 125±2°C where allowed). Results are obtained as the arithmetic mean of two determinations and expressed with specified significant figures.

General information

• Status: Active / in force (Действует).
• Publication date: Adopted October 21, 1993; date of introduction / entry into force 01 January 1995 (often quoted by publishers as 1995-01-01).
• Publisher: Developed by Gosstandart (State standard body) and adopted by the Interstate Council for Standardization, Metrology and Certification; published under the Russian national standards framework.
• ICS / categories: 83.040.20 — Rubber compounding ingredients (carbon black test methods).
• Edition / version: Original GOST 25699.10-93 edition (designation suffix -93 indicates the 1993 adoption); single definitive edition in common use (various vendor copies and translations available).
• Number of pages: Typical published texts list 7–8 pages (varies by vendor/format and translated editions).

Scope

This standard applies to untreated (non‑oiled) technical carbon black intended for use in the rubber industry. It establishes a laboratory method for determining the mass fraction of material retained on specified sieves after wet washing (sieve residue). The method is not applicable to oil‑treated carbon blacks because oil hinders wetting and the washing procedure. Mesh sizes and sample masses are selected according to technical requirements for the material under test.

Key topics and requirements

• Purpose and field of application: measurement of sieve residue for technical carbon black used in rubber compounding.
• Apparatus: specified sieves (phosphor bronze or stainless steel per relevant GOST), wet‑washing device with nozzle and pressure regulator, filter on water line, analytical and laboratory balances, drying oven and desiccator.
• Sample mass: typically 50.00 g for very fine sieves (e.g., 0.045 mm and 0.14 mm) and 100.00 g for coarser (e.g., 0.5 mm), depending on the sieve used.
• Procedure: prepare a suspension (alcohol prewetting for some types), transfer to the sieve apparatus, wash until washings run clear, dry the retained fraction and weigh; repeat and take the arithmetic mean of two determinations.
• Test conditions and limits: water pressure about 0.2–0.3 MPa; drying at (105±2)°C (or optionally 125±2°C in specific clauses); required measurement precision and rounding rules are specified in the standard.
• Results and reporting: mass fraction (%) calculated by formula in the standard; report testing apparatus, sieve mesh size, water pressure, temperature used, test results and method of expression.

Typical use and users

Primary users are quality control and testing laboratories at carbon black manufacturers, rubber compounders and independent materials testing laboratories; R&D groups in the rubber and tires industry also use the method for characterization and specification compliance. Vendor and standards distributors provide purchasable translations and printable copies for laboratory reference.

Related standards

GOST 25699.10-93 is part of the GOST 25699 series addressing carbon black test methods for rubber compounding (examples: GOST 25699.3-90 — iodine number; GOST 25699.4-90 — specific surface area; GOST 25699.5-90 — DBP absorption; GOST 25699.7-90 — loss on heating; GOST 25699.8-90 — ash; GOST 25699.9-90 — sulfur). It is also referenced by related rubber/carbon black specifications (for example in product technical conditions such as GOST 7885‑86).

Keywords

GOST 25699.10-93; carbon black; technical carbon; sieve residue; wet sieving; rubber compounding ingredients; mesh sizes; laboratory method; water‑jet washing; particle size residue.

FAQ

Q: What is this standard?

A: GOST 25699.10-93 is a Russian (Interstate) standard that specifies a laboratory method for determining the mass fraction of sieve residue in technical carbon black used in rubber compounding.

Q: What does it cover?

A: It covers apparatus, sampling, preparation (including optional alcohol prewetting for some forms), a controlled wet‑washing sieving procedure using defined water pressure, drying and weighing of the retained fraction, calculation of mass fraction and reporting requirements.

Q: Who typically uses it?

A: Quality control and testing laboratories at carbon black producers, rubber and tire manufacturers, independent test labs and R&D groups concerned with particle fines, specification compliance and formulation performance.

Q: Is it current or superseded?

A: As published in available standards databases and vendor catalogs the GOST 25699.10-93 text is listed as active / in force with introduction date 01 January 1995; no widely published superseding replacement is shown in those records. Users should confirm status with their national standards body or Rosstandart for the latest legal/administrative status before relying on it for regulatory compliance.

Q: Is it part of a series?

A: Yes — it is one part of the GOST 25699 series addressing various test methods for carbon black used in rubber compounding (several other parts cover iodine number, surface area, DBP absorption, ash, sulfur, loss on heating, etc.).

Q: What are the key keywords?

A: Carbon black, technical carbon, sieve residue, wet sieving, rubber compounding, mesh sizes, test method, GOST 25699 series.