When Coffee Meets Water - Deepstash
Coffee Culture

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Coffee Culture

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When Coffee Meets Water

When Coffee Meets Water

There are two families of brewing devices within the low-concentration methods – those that fully immerse the coffee in the brewing water and those that flow the water through the coffee bed.

From a physical perspective, the major difference is that the temperature of the coffee particulates is higher in the full immersion system. The slowest part of coffee extraction is not the rate at which compounds dissolve from the particulate surface. Rather, it’s the speed at which coffee flavour moves through the solid particle to the water-coffee interface, and this speed is increased with temperature.

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296 reads

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Other Variables To Control

Other Variables To Control

Even if you can optimize your brew method and apparatus to precisely mimic your favourite barista, there is still a near-certain chance that your home brew will taste different from the cafe’s.

There are three subtleties that have a tremendous impact on the coffee quality: water che...

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259 reads

The Brew Methods

The Brew Methods

There are many ways, though, to achieve a drink containing 1.2 to 1.5 percent coffee. A pour-over, Turkish, Arabic, Aeropress, French press, siphon or batch brew (that is, regular drip) apparatus – each produces coffee that tastes good around these concentrations. These brew methods also boast an...

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322 reads

Coffee Freshness

Coffee Freshness

Roasted coffee contains a significant amount of CO₂ and other volatiles trapped within the solid coffee matrix: Over time these gaseous organic molecules will escape the bean. Fewer volatiles means a less flavorful cup of coffee. Most...

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220 reads

The Strongness Of The Beans

The Strongness Of The Beans

We humans seem to like drinks that contain coffee constituents (organic acids, Maillard products, esters and heterocycles, to name a few) at 1.2 to 1.5 percent by mass (as in filter coffee), and also favour drinks containing 8 to 10 percent by mass (as in espresso). 

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358 reads

Brewing Isn't A Simple Matter

Brewing Isn't A Simple Matter

Pour-overs and other flow-through systems are more complex. Unlike full immersion methods where time is controlled, flow-through brew times depend on the grind size since the grounds control the flow rate.

The water-to-coffee ratio matters, too, in the brew time. Simply grinding finer to in...

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256 reads

The Water Chemistry

The Water Chemistry

Given coffee is an acidic beverage, the acidity of your brew water can have a big effect. Brew water containing low levels of both calcium ions and bicarbonate (HCO₃⁻) – that is, soft water – will result in a highly acidic cup, sometimes described as sour. Brew water containing high levels of HC...

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241 reads

Making Great Coffee

Making Great Coffee

Coffee is unique among artisanal beverages in that the brewer plays a significant role in its quality at the point of consumption. In contrast, drinkers buy draft beer and wine as finished products; their only consumer-controlled variable is the temperature at which they ...

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378 reads

The Last Sip

The Last Sip

So don’t feel bad that your carefully brewed cup of coffee at home never stacks up to what you buy at the café. There are a lot of variables – scientific and otherwise – that must be wrangled to produce a single superlative cup. Take comfort that most of these variables are not optimized by some ...

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230 reads

Particle Size Distribution By The Grinder

Particle Size Distribution By The Grinder

Every coffee enthusiast will rightly tell you that blade grinders are disfavored because they produce a seemingly random particle size distribution; there can be both powder and essentially whole coffee beans coexisting. The alternative, a burr grinder, features two pieces of metal with teeth tha...

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215 reads

CURATED FROM

CURATED BY

trstro

Dramatherapist

Sciency thingies behind The Perfect Brew!

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Making coffee: Timing is important

Making coffee: Timing is important

Freshly boiled water acts as a solvent to the coffee molecules. The molecules that contribute to the acidity and sweetness tend to extract more quickly than those that contribute to bitterness.

An under-extracted cup that wasn't brewed long enough makes the coffee taste too sour. An over-e...

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