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.
Số hiệu tiêu chuẩn
ISO 9177-2
Tên tiêu chuẩn
Mechanical pencils; part 2: black leads; classification and dimensions
Ngày phát hành
1989-03-00
Tiêu chuẩn tương đương
SANS 9177-2:1989*SABS ISO 9177-2:1989 (1995-04-05) * DIN ISO 9177-2 (1990-03), IDT * DIN ISO 9177-2 (1987-04), IDT * NF E04-707-2 (1990-04-01), IDT * UNI ISO 9177/2 (1991), IDT * JIS S 6005 (1996-03-01), NEQ * JIS S 6005 (2000-05-20), MOD * JIS S 6005 (2007-06-20), MOD * JIS S 6006 (1996-03-01), NEQ * SS-ISO 9177-2 (1996-03-15), IDT * UNE 1164-2 (1996-04-18), IDT * GOST R 50249 (1992), IDT * GOST 19445.1 (1995), IDT * NEN-ISO 9177-2 (1990), IDT * UNI ISO 9177-2:1991 (1991-01-31), IDT * CSN ISO 9177-2 (1994-11-01), IDT * NEN-ISO 9177-2:1990 en (1990-05-01), IDT * SABS ISO 9177-2:1989 (1995-04-05), IDT
Tiêu chuẩn liên quan
ISO 128 (1982-07) * ISO 9177-1 (1989-03)
Từ khóa
Classification * Classification systems * Crayons * Definitions * Design * Designations * Dimensions * Drawing office equipment * Graphite * Hardness * Leads (pencils) * Materials * Mechanical pencils * Pen refills * Pencils * Propelling pencils * Stationery * Tolerances (measurement) * Mines * Slugs * Obturating points * Drawing system
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