Overview
ISO 10545-13:2016 - Ceramic tiles - Part 13: Determination of chemical resistance - specifies a standardized laboratory test method for assessing the chemical resistance of ceramic tiles at room temperature. The procedure is applicable to all types of ceramic tiles and defines test solutions, specimen preparation, exposure conditions and visual classification criteria used to evaluate damage from household chemicals, swimming pool salts, acids and alkalis.
Keywords: ISO 10545-13, chemical resistance, ceramic tiles, tile testing, ISO standard.
Key topics and technical requirements
- Scope: Test method for chemical attack on the tile’s proper face at room temperature; applicable to all ceramic tile types.
- Test solutions: Defined aqueous solutions include household chemicals (ammonium chloride 100 g/l), swimming pool salts (sodium hypochlorite 20 mg/l), low- and high-concentration acids and alkalis (e.g., HCl 3% and 18%, citric acid 100 g/l, lactic acid 5%, KOH 30 g/l and 100 g/l). Other solutions may be agreed by parties.
- Specimen preparation: Clean with solvent (e.g., ethanol); dry at (105 ± 5) °C for at least 2 h; test within 3 h after cooling to room temperature.
- Exposure methods:
- Partial-contact using a sealed glass cylinder: fill to (20 ± 1) mm above specimen.
- Full immersion option: vertical immersion to 25 mm depth in a suitable vessel.
- Exposure conditions: Maintain at (20 ± 5) °C. Contact times: typically 24 h for household, pool salts and citric acid; (96 ± 1) h for HCl, lactic acid and KOH with solution refreshed after ~48 h.
- Post-test: Rinse under running water 10 min, dry at (105 ± 5) °C, cool before evaluation.
- Classification and evaluation:
- Visual examination, pencil test (HB pencil) and reflection test (40 W lamp) for normal classification into classes A, B, C.
- Alternative visual classification (A(V), B(V), C(V) and LA/HA variants) for tiles where the pencil/reflection tests are not applicable.
- Test report: Must reference ISO 10545-13 and record tile description, procedure, test solutions, results and classification per solution/specimen.
Applications and who uses this standard
- Tile manufacturers use ISO 10545-13 for product development, quality control and to substantiate claims about chemical resistance.
- Independent testing laboratories apply the standard to certify and compare ceramic tiles.
- Architects, specifiers and contractors rely on the classification to select tiles for environments exposed to chemicals - e.g., kitchens, laboratories, pools, industrial or healthcare areas.
- Procurement and compliance teams use the standard to ensure tiles meet contractual or regulatory chemical-resistance requirements.
Related standards
- ISO 10545 series (other test methods for ceramic tiles) - consult the ISO website for the full list.
- Normative reference within the text: ISO 3585 (borosilicate glass 3.3) for glassware material.
Using ISO 10545-13 helps ensure consistent, reproducible evaluation of tile performance against chemical attack, enabling informed material selection and reliable product claims.
