Gallery: San Francisco’s Sightglass Coffee Shows Off Every Angle of the...

The half-century old cast-iron Probat roaster is on and operated four days a week. In the near future, Sightglass will roast every day of the week to keep up with growing demand. Jerad fired up the roaster for us and explained the benefits of cast-iron and the importance of keeping a roaster clean, namely it retains heat very well and clearing particulates encourages proper air flow, consistency and peak flavor while eliminating the danger of a fire at startup.

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