Resumen
ISO 27668-2:2009 establishes minimum quality requirements for gel ink ball pens (refillable or non‑refillable) and refills for documentary use.
Basic requirements for gel ink ball pens for general use are given in ISO 27668-1.
ISO 27668-2:2009 establishes minimum quality requirements for gel ink ball pens (refillable or non‑refillable) and refills for documentary use.
Basic requirements for gel ink ball pens for general use are given in ISO 27668-1.