TS ISO 3864-3

TS ISO 3864-3 is the standard that sets out principles for designing graphical symbols used in safety signs. This part focuses on symbols used in the safety sign system defined in ISO 3864-1 and in the safety sign element of product safety labels defined in ISO 3864-2, so its concern is not only how a symbol looks, but how clearly and consistently it communicates a safety message.

What the design principles are meant to support

In general technical terms, graphical symbols reduce dependence on text and help users grasp meaning quickly. For safety communication, that means the pictogram’s form, line style, proportions and visual distinctiveness all matter. This part of ISO 3864 provides guidance for shaping symbols so the intended warning or instruction remains recognisable and coherent across applications, supporting more consistent safety communication.

Position within the ISO 3864 family

• ISO 3864-1 provides the overall framework for safety signs and safety markings.
• ISO 3864-2 addresses the safety sign element used on product safety labels.
• ISO 3864-3 defines the design principles for graphical symbols used in those signs.
• It serves as a reference for understanding how a symbol fits into a safety message and how it should be designed for that role.

This standard is about design principles rather than a single fixed symbol. Its practical value lies in giving developers and users a common design logic when creating or comparing symbols for safety communication. The aim in safety signs is rapid understanding and reduced risk of misinterpretation, and TS ISO 3864-3 structures the graphical approach that supports that aim.