GOST 18299-72 PDF

Full title and description

GOST 18299-72 — Paintwork materials. Method for determination of tensile strength, relative elongation at tear and modulus of elasticity. The standard specifies a laboratory testing method for free paint and varnish films to determine tensile strength, elongation at rupture and the modulus of elasticity of the film under controlled conditions.

Abstract

This standard defines procedural requirements, apparatus, sample preparation, test speeds and calculation methods for measuring the tensile properties of free films of paint and varnish materials. It is intended to provide reproducible laboratory test results for quality control, specification and materials research. The document includes recommended sample shapes/sizes, conditioning instructions and method for processing test data (stress–strain recording and calculation of modulus).

General information

• Status: Active (listed as current in international standards databases; the text was amended—see amendment 10.88).
• Publication date: Introduced/approved in 1972 (resolution dated 25 December 1972); formal publication/issue date commonly listed as 1 July 1974.
• Publisher: State Committee for Standards of the USSR (Gosstandart); developed with input from the Ministry of Chemical Industry.
• ICS / categories: Paints and varnishes / testing and materials — ICS 87.040 (Paints and varnishes) and related paint ingredient categories (87.060).
• Edition / version: Original designation -72 (1972); later reprints/editions and an amendment (10.88) were issued.
• Number of pages: 9 (commercial and standards catalog listings most frequently show 9 pages).

Scope

Applies to free films of paint and varnish materials (laboratory-prepared films) and specifies the method to determine: tensile strength at break, relative elongation at break and the modulus of elasticity of the film. It covers required testing equipment (tensile testing machine with graphical recording), specimen preparation and dimensions, conditioning, test speeds, number of specimens and the calculation and presentation of results. The method is intended for quality control, product specification and comparative testing of coating materials.

Key topics and requirements

• Required apparatus: tensile testing machine with appropriate load range (up to ~500 N) and graphical (stress–strain) recording with specified accuracy limits.
• Specimen preparation: free film preparation per referenced standards; recommended specimen shapes and stamping die dimensions are provided (recommended working-piece dimensions, edge clearances, and a minimum of five specimens per test).
• Test speeds and tolerances: defined speeds (e.g., 1, 2–2.5, 5, 10, 20–25, 50 mm/min) with allowable deviations; measurement accuracy requirements for load and displacement.
• Thickness measurement: procedure for measuring film thickness (three measurements across working length) and permitted thickness variation limits for specimens.
• Data processing: determination of tensile strength, elongation at break and modulus from stress–strain recording with instructions for selecting scales and calculating mean values and allowable scatter.

Typical use and users

Used by paint and coatings manufacturers, quality control and testing laboratories, R&D departments, material specifiers and certification bodies to verify mechanical properties of free films, compare formulations, check production batches and support technical specifications for coatings. Laboratories conducting comparative tests or validating new formulations commonly apply this method.

Related standards

The standard references related normative documents used for sample preparation and conditioning (for example, ГОСТ 14243-78 for free film preparation) and is part of a set of GOST test methods for coatings and chemical protective materials. Other GOSTs on paint testing and materials (numbers in the 182xx–23xxx ranges) are commonly used in conjunction.

Keywords

GOST 18299-72; paintwork materials; paints and varnishes; tensile strength; elongation at break; modulus of elasticity; free film testing; specimen preparation; tensile test; coatings laboratory.

FAQ

Q: What is this standard?

A: GOST 18299-72 is a Soviet/Russian standard specifying a laboratory test method to determine tensile strength, relative elongation at tear and modulus of elasticity of free paint and varnish films.

Q: What does it cover?

A: It covers required apparatus and accuracy, specimen form and preparation, conditioning, test speeds and tolerances, measurement of thickness, procedure for performing tensile tests on free films and calculation/recording of results.

Q: Who typically uses it?

A: Coatings and paint manufacturers, QC and independent testing laboratories, R&D teams, specification writers and certification bodies use this method when they need reproducible tensile-property data for free films.

Q: Is it current or superseded?

A: Commercial standard indexes and translations list GOST 18299-72 as active; the text has recorded amendments (notably amendment 10.88) and reprints. Users should check national/regional catalogues or official standards bodies for the absolute current legal status in their country before relying on it for regulatory compliance.

Q: Is it part of a series?

A: Yes — it is one of a set of GOST methods for testing paint and varnish materials and is linked by references (for example to ГОСТ 14243-78 for film preparation). It is commonly used alongside other GOST and ISO/IEC methods for coatings testing.

Q: What are the key keywords?

A: Tensile strength, elongation at break, modulus of elasticity, paint film, free film, specimen, tensile test, coatings testing, ГОСТ 18299-72.