ISO 4593-1993 PDF

Full title and description

St ISO 4593-1993 — Plastics — Film and sheeting — Determination of thickness by mechanical scanning. This International Standard specifies a mechanical-scanning method for measuring the thickness of plastic film and sheeting; the method is not suitable for embossed film or sheeting.

Abstract

Specifies a procedure and apparatus requirements for determining the thickness of samples of plastics film or sheeting using mechanical scanning. Gives guidance on specimen preparation, measuring-device accuracy classes for different thickness ranges, and limitations (not applicable to embossed materials).

General information

• Status: Published (International Standard, confirmed following systematic review).
• Publication date: November 1993 (Edition 2, published 1993-11).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 83.140.10 — Films and sheets (plastics).
• Edition / version: Edition 2 (1993).
• Number of pages: 2 pages.

Scope

This standard specifies a mechanical scanning technique for determining the thickness of plastic film and sheeting samples. It defines the required measuring device accuracy for different thickness ranges, specimen preparation (cutting and positions across the sample width), and procedural steps for scanning. It explicitly excludes embossed films and sheets from applicability.

Key topics and requirements

• Definition of the mechanical scanning method for thickness measurement (principle and general procedure).
• Apparatus requirements: thickness-measuring device accuracy classes (e.g., ±1 μm up to 100 μm, ±2 μm for 100–250 μm, ±3 μm above 250 μm).
• Specimen preparation: recommended specimen width (~100 mm), sampling positions across the width (e.g., positions approximately 1 m apart along length when relevant), and handling to avoid creases.
• Limitations and exceptions: not suitable for embossed film or sheeting; guidance on transmission of measured values (mechanical, optical or electronic transduction mentioned).
• Reporting: measured thickness values, measurement conditions, and apparatus accuracy class to be recorded.

Typical use and users

Used by quality-control laboratories, materials testing laboratories, manufacturers of plastic films and sheets, converters, and R&D departments to verify and document film/sheet thickness and uniformity for production control, specification compliance, and product development.

Related standards

Revises and replaces ISO 4593:1979 (withdrawn). Related test-method standards for films and sheets include other ISO methods for mechanical and dimensional testing, friction measurement, and tensile testing of films and sheets.

Keywords

plastic film, sheeting, thickness measurement, mechanical scanning, test method, film thickness, measuring device accuracy, specimen preparation.

FAQ

Q: What is this standard?

A: ISO 4593:1993 is an International Standard that specifies a mechanical-scanning method to determine the thickness of plastics film and sheeting.

Q: What does it cover?

A: It covers the apparatus, accuracy requirements for thickness-measuring devices for different thickness ranges, specimen preparation and positioning, test procedure for mechanical scanning, and reporting. It excludes embossed film or sheeting.

Q: Who typically uses it?

A: Quality-control and materials-testing laboratories, film and sheet manufacturers, converters, and product developers use this standard to measure and document film thickness and uniformity.

Q: Is it current or superseded?

A: ISO 4593:1993 is the current published edition that replaced ISO 4593:1979 (the 1979 version was withdrawn). The 1993 edition is recorded as published and has been subject to ISO confirmation/review cycles.

Q: Is it part of a series?

A: It is part of ISO test-methods for plastics films and sheeting (work under ISO/TC 61/SC 11) and relates to other film/sheet testing standards, but it is a standalone method specifically for thickness by mechanical scanning.

Q: What are the key keywords?

A: Plastic film, sheeting, thickness, mechanical scanning, thickness-measuring device, specimen preparation, test method.