Reference number
ISO 9177-2:1989
ISO 9177-2:1989
Mechanical pencils — Part 2: Black leads — Classification and dimensions
Edition 1
1989-03
Retirada
ISO 9177-2:1989
16782
Retirada (Edición 1, 1989)

Resumen

Two types are available, black leads in which the binding agent is an organic polymer (designated by the letter "P"), and black leads in which the binding agent is clay (designated by the letter "C"). Classification is made according to the degree of hardness. Part 1 deals with the classification, dimensions, performance requirements and testing.

Informaciones generales

  •  : Retirada
     : 1989-03
    : Retirada de la Norma Internacional [95.99]
  •  : 1
     : 2
  • ISO/TC 10
    97.180  01.100.40 
  • RSS actualizaciones

Ciclo de vida

¿Tiene alguna duda?

Consulte nuestras Ayuda y asistencia