Signage design In addition to prescribing colours for safety signage, ISO 3864 also specifies how to layout the elements of the sign: A symbol and optional 'supplemental sign' which contains the supplementary text message.
Signage des.ign In addition to prescribing colours for safety signage ISO 3864 also specifies how to layout the elements of the sign A symbol and optional 'supplemental sign' which ,contains the supplementary text me:ssage