1.08 Recap and Glossary
- The specific heat of a brewing device should be considered when preheating.
- Unbleached filter papers impart a cardboardy taint to brewed coffee.
- Rinsing filter papers helps to remove residues of dissolved lignin from filter papers.
- Aromatics total less than 0.4% of the total gas content of roasted coffee.
- BH has measured a 20% loss of roasting gases just one minute after grinding coffee so it is essential to grind and brew immediately.
- Coffee grinds should be horizontally levelled before brewing.
- Hand brews require manual agitation to ensure all the coffee bed is saturated simultaneously.
- The birdsnest technique can help to guide brew water down to the bottom of the coffee bed during blooming.
- The height and flow rate you use when pouring affects the level of turbulence you create.
- Pouring with a directional-flow will create an uneven coffee bed unless you compensate with some manual agitation.
- Orbiting the coffee bed can help to disperse the turbulence more evenly.
- The final phase of the brewing cycle is called the drawdown. This phase requires a level coffee bed.
- Level coffee beds can be achieved with the Rao Spin, or the NSEW technique.
- Agitating into the coffee bed seems to promote fines migration which has the effect of elongating drawdown times.
Brew cycle the amount of time the water takes to pass through the coffee bed
Brew water The total amount of water used for extracting coffee grinds
Clumping (Clumps) The unintended packing of grinds to form small chunks
Conductor A material that allows electrons to move freely through it.