Pregled nacrta

ISO 21227-1:2003 gives definitions for and provides guidance in the use of optical imaging systems for the quantitative characterization of defects on coated surfaces that occur after exposure in various test methods, e.g. stone chipping, weathering or cross-cut testing. One aim of ISO 21227 is to use optical imaging to reproduce the results of already existing methods for visual assessment. Additionally, optical imaging provides further information which can be used for a more detailed evaluation of coating defects.
This part of ISO 21227 contains a general introduction in optical-imaging methods and definitions. The performance of individual test methods and requirements for precision are described in other parts of the standard.

ISO 25178-6:2010 describes a classification system for methods used primarily for the measurement of surface texture. It defines three classes of methods, illustrates the relationships between the classes, and briefly describes specific methods.

Ovaj je dokument, HRN EN 228:2025/NA:2026, Goriva za motorna vozila – Bezolovni motorni benzin – Zahtjevi i metode ispitivanja – Nacionalni dodatak izdao Hrvatski zavod za norme na temelju članka 12. Zakona o normizaciji („Narodne novine“, br. 80/2013) i u skladu s Unutrašnjim pravilima za normizaciju, UPN 3:2021. Pripremio ga je tehnički odbor HZN/TO 28, Naftni proizvodi i maziva Hrvatskoga zavoda za norme.

Ovaj dokument omogućuje primjenu norme HRN EN 228:2025 u Republici Hrvatskoj.