English to Turkish Tech/Engineering Mechanics / Mech Engineering Gears

Dişlilerde diş temasını kontrol etmek için kullanılan iki yöntem. Türkçe'de özel bir ismi var mı, nasıl kullanılıyor hiç bilmiyorum.
Açıklaması şu şekilde:

The contact can be checked two ways:

• Soft blue: Apply soft machinist's bluing or transfer bluing to the teeth of one gear and roll that gear by hand through mesh with its mating gear. (The terms "blue" or "bluing" are used for convenience; the dye is available in other colors.) The transfer of the blue from one gear to the other gear is read as the contact.
• Hard blue: Paint the gear teeth with hard or layout blue, run the gear unit, and observe the pattern of 'wear-off' of the bluing. (The terms "blue" or "bluing" are used for convenience; the dye is available in other colors.)
Contact checking may usually be accomplished through the inspection cover port. Occasionally, soft blue checking is done with the housing cover removed, such as during the reassembly process.

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