TS EN ISO 18451-1

TS EN ISO 18451-1 is a terminology standard that defines the general terms used in the field of pigments, dyestuffs and extenders. It establishes a common vocabulary for discussing these materials in manufacturing, formulation, quality documentation and technical communication, so that the same concepts are understood consistently across the coating, ink, plastics and related industries.

How the material families differ

In general technical usage, pigments are insoluble colorants that impart colour and often opacity mainly through optical effects. Dyestuffs are typically soluble colorants that colour the medium by dissolving in it. Extenders, also called fillers in many contexts, are usually used less for colour and more to influence volume, rheology, surface properties, processing behaviour and cost balance. These distinctions matter because they affect how a formulation is designed, how it performs and how it is described in specifications.

What this part of ISO 18451 covers

According to the supplied scope, this part of ISO 18451 defines the terms used in this subject area. It is therefore a vocabulary reference rather than a test method or performance specification. Terminology standards are especially valuable where the same material family is handled by suppliers, formulators, laboratories and end users, because they reduce ambiguity in contracts, reports, datasheets and regulatory or technical discussions.

• provides common definitions for the core terms of the field
• supports consistent use of pigment, dyestuff and extender terminology
• helps distinguish function, composition and usage in technical documents
• improves clarity in specifications, reports and product literature