Средства выполнения технических чертежей. Чертежная калька
Название (англ.):
Draughting media for technical drawings; natural tracing paper
Описание (англ.):
Specifies the minimum requirements, details qualities necessary for draughting and reproduction, and specifies appropriate test methods for the most commonly used grammages. Annex A describes measurement of transparency using the reflectance method, Annex B describes determination of tear growth resistance.