ISO 10349-4-1992 PDF

Full title and description

ISO 10349-4:1992 — Photography — Photographic-grade chemicals — Test methods — Part 4: Determination of residue after ignition. Specifies a laboratory test method to measure non-volatile residue remaining after ignition of a defined test portion of photographic-grade chemicals.

Abstract

This part of ISO 10349 defines a gravimetric procedure: weigh a measured test portion into a prepared ignition crucible, remove volatile matter by gentle heating, incinerate the sample in a furnace to constant mass, cool in a desiccator and reweigh to determine residue after ignition. The method is written for photographic-grade reagents and concentrates and is intended for routine quality-control testing and specification verification.

General information

• Status: Published (International Standard; confirmed on ISO review cycle).
• Publication date: December 1992 (edition 1 — 1992-12 / listed 30 December 1992).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 37.040.30 (Photographic chemicals).
• Edition / version: Edition 1 (1992).
• Number of pages: 2 pages (concise method specification).

Scope

This standard specifies a general test method for determination of the residue after ignition for photographic‑grade chemicals. It applies to reagents and solutions used in photographic processing where measurement of non‑volatile residue is required for quality control, acceptance testing or specification. The procedure is a short, repeatable gravimetric test intended for laboratory use and reference testing programs.

Key topics and requirements

• Definition of test portion and sample preparation (weighing of a representative aliquot).
• Use of a prepared ignition crucible to contain the sample and to collect residue.
• Controlled pre‑heating to drive off volatile components before final incineration.
• Incineration in a furnace to constant mass and cooling in a desiccator to avoid moisture pickup.
• Final reweighing and calculation of residue as mass percent (residue after ignition).
• Reference to Part 1 (general provisions) for reagents, apparatus and reporting conventions used across the series.

Typical use and users

Laboratories performing quality control and acceptance testing of photographic‑grade chemicals, chemical manufacturers, photographic materials suppliers, standards bodies and accreditation laboratories use this method to verify non‑volatile residue levels. The test is suitable where a short, standardized gravimetric residue determination is required for batch release, specification checks or comparative testing.

Related standards

Part 4 is one element of the ISO 10349 series (Photographic‑grade chemicals — Test methods). Relevant related documents include ISO 10349‑1:1992 (General — later revised), and other parts of ISO 10349 that specify additional test methods (for example parts dealing with density, specific gravity and other chemical tests). Users should consult the other parts of ISO 10349 and the most recent revisions for the complete test suite applicable to photographic chemicals.

Keywords

ISO 10349-4:1992; photographic-grade chemicals; residue after ignition; incineration; gravimetric test; ignition crucible; quality control; photographic chemistry; test method.

FAQ

Q: What is this standard?

A: ISO 10349-4:1992 is an ISO test method that specifies how to determine the residue remaining after ignition of a measured portion of photographic‑grade chemicals (a short gravimetric procedure used in QC and specification testing).

Q: What does it cover?

A: It covers the sampling, preparation, ignition/incineration, cooling and reweighing steps needed to obtain the mass of non‑volatile residue after ignition, and how to report the result. The procedure is concise (published as a 2‑page method) and references the general requirements given in Part 1 of the series.

Q: Who typically uses it?

A: Chemical manufacturers, photographic materials laboratories, purchasing/QA departments and test laboratories that need a standardized procedure to measure non‑volatile residues in photographic reagents and processing solutions.

Q: Is it current or superseded?

A: ISO 10349‑4:1992 is listed as a published International Standard from 1992. The ISO entry for the part indicates it is published and subject to the ISO review/confirmation cycle; users should check the ISO catalogue or their national standards body for the most recent confirmation or revision status before relying on it for regulatory or contractual purposes.

Q: Is it part of a series?

A: Yes — it is Part 4 of the ISO 10349 series (Photography — Photographic‑grade chemicals — Test methods). The series contains multiple parts (Part 1 general, and additional parts covering other determinations). Consult the series index and Part 1 for cross references and shared provisions.

Q: What are the key keywords?

A: Photographic-grade chemicals; residue after ignition; ignition residue; gravimetric method; incineration; ISO 10349; quality control; photographic chemistry.