tempering oil

tempering oil

[′tem·pə·riŋ ‚ȯil]
(materials)
A high-viscosity neutral petroleum oil, such as a steam cylinder stock, used for the drawing or tempering of steel. Also known as steam-hammer oil; summer black oil.
References in periodicals archive ?
But there is concern that further financial troubles related to eurozone debt may be tempering oil demand at the margin.
Analysts question whether the latest round of price rises will be very effective in tempering oil demand growth.
Heat the tempering oil in a separate pan on a high heat.