When people discover what is decaf coffee, they often wonder what the difference is to regular caffeinated coffee. Now you know what is decaf coffee, why not explore more unforgettable coffee types and find out what a latte is? The latte is a frothy coffee that's cherished all over the world, but what is a latte, where does it come from and what makes it so unique? The cappuccino is the UK's second favourite coffee, but what is a cappuccino and what makes it so different from other coffee types?
The americano is often mistaken for just a standard black coffee, but it's so much more than that. Types of Coffee What is Decaf Coffee? What is decaf coffee? Origins of decaf coffee Now we know what decaf coffee is, where did it come from? Explore the history of coffee. Differences between decaffeinated and caffeinated coffee When people discover what is decaf coffee, they often wonder what the difference is to regular caffeinated coffee. Other articles you might be interested in.
What is a Latte? Find out more. What is a Cappuccino? For many people, the pleasure of drinking coffee is outweighed by the caffeine-fuelled negatives.
As the taste for coffee has grown, decaffeinated coffee's flavour has improved Credit: Getty Images. Could caffeine be removed from coffee? The first person to hit upon a practical decaffeination method was another German, Ludwig Roselius , the head of the coffee company Kaffee HAG. Roselius discovered the secret to decaffeination by accident. In , shipment of coffee had been swamped by seawater in transit — leaching out the caffeine but not the flavour.
Roselius worked out an industrial method to repeat it, steaming the beans with various acids before using the solvent benzene to remove the caffeine. Decaffeinated coffee was born. Benzene, it turned out, was a possible carcinogen, so the search was on for new techniques that could prise out the caffeine from the beans — and yet leave the flavour intact.
You might think that it would be easier to roast the coffee, grind it into the required powder espresso, filter or instant and then begin the decaffeination process. Not, so says Stemman. There are several ways to decaffeinate coffee but the most prevalent is to soak them in a solvent — usually methylene chloride or ethyl acetate. Methylene chloride can be used as a paint stripper and a degreaser as well an agent to remove caffeine. Caffeine has to be taken out of coffee beans before they are roasted Credit: Getty Images.
The beans are first soaked in water and then covered in a solution containing either of these solvents. The caffeine is then drawn out by the solvent. The solvent-laced water is then reused again and again until it is packed with coffee flavourings and compounds — pretty much identical to the beans, except for the caffeine and solvent.
FDA rules allow up to 10 parts per million of residual methylene, but coffee decaffeination usually uses solutions with one part per million. Two other methods use water.
The Swiss Water method sees the beans soaked with water; the caffeine rich solution full of flavours is then strained though activated carbon which captures the caffeine. Starting in Switzerland in the s, the process was first used commercially in It gained favour because it was the first decaffeination method not to use solvents. Beans that have been soaked in water are put in a stainless-steel extractor which is then sealed, and liquid CO2 blasted in at pressures of up to 1,lbs per square inch.
0コメント