Last Updated
：2025/12/05
smoke-shade
Noun
archaic
Japanese Meaning
（古語）煤煙中の未燃焼炭の量に基づき、石炭の種類を評価するために、0から10までの尺度で示される色調・濃淡の等級。
（ plural ）
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(archaic) A tint measured from 0 to 10 on a scale for comparing different varieties of coal according to the amount of unburnt carbon in their smoke.
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smoke-shade
At the weekly inspection, the engineer noted a smoke-shade of 7 for the seam, an archaic rating that reflected a high proportion of unburnt carbon in the smoke.
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At the weekly inspection, the engineer noted a smoke-shade of 7 for the seam, an archaic rating that reflected a high proportion of unburnt carbon in the smoke.
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