Translation guide
The English word 'graphite' refers to a soft, black, crystalline form of carbon used in pencils, lubricants, and industrial applications. In Japanese, the most common and direct equivalent is 黒鉛 (kokuen), but other terms exist depending on context, such as 石墨 (sekiboku) for a more traditional or mineralogical term, and グラファイト (gurafaito) as a loanword often used in technical or industrial settings.
graphite (technical/loanword)
Used in scientific and industrial contexts.
Referring to the substance itself, as a mineral, material, or in general contexts.
The standard Japanese word for graphite. Used in everyday contexts, science, and industry. Literally 'black lead', reflecting its appearance and use in pencils.
Pencil lead is made of graphite.
Graphite conducts electricity.
A less common term for graphite, often used in mineralogy or traditional contexts. Literally 'stone ink'. Can sound slightly more formal or technical.
Loanword from English 'graphite'. Common in technical, industrial, or scientific contexts, especially when referring to graphite as a material in engineering or manufacturing.
Specifically referring to the 'lead' in pencils, which is actually graphite.
The most natural way to refer to pencil 'lead'. While 芯 (shin) means 'core' or 'lead', it is understood to be graphite. Using 黒鉛 (kokuen) is also correct but less common in everyday speech about pencils.
The pencil lead broke.
This pencil lead is soft.
Can be used to specify the material of the pencil lead, but in casual conversation, 鉛筆の芯 is more common.
Referring to graphite used for its lubricating properties or in industrial applications like batteries, crucibles, etc.
The standard term in industrial contexts as well. Used for graphite powder, lubricants, and components.
Graphite is a lubricant that can be used even at high temperatures.
Frequently used in technical specifications, product names, and scientific papers.
黒鉛 (kokuen) is the everyday and standard term. 石墨 (sekiboku) is more traditional and mineralogical, rarely used in modern conversation. グラファイト (gurafaito) is a loanword common in technical fields. For most purposes, 黒鉛 is the best choice.
Although the kanji 鉛 means 'lead' (the metal), pencil lead is not made of lead but graphite. The word 鉛筆 (enpitsu, pencil) literally means 'lead brush', a historical misnomer. When talking about pencil lead, 鉛筆の芯 (enpitsu no shin) is the natural phrase.
石墨は炭素の同素体の一つです。
Graphite is one of the allotropes of carbon.
This part is coated with graphite.
鉛筆の芯には黒鉛が使われている。
Graphite is used in pencil lead.
Graphite sheets are used as heat dissipation materials.