5 coffees · from 4 roasters
Specialty decaf has come a long way. Roasters now buy good green coffee and send it to be decaffeinated before roasting, so a decaf can taste of chocolate, fruit and caramel like any other coffee.
The common methods are the Swiss Water Process, which uses water and carbon filters, and the sugarcane or ethyl acetate process, which uses a compound made from fermented sugarcane and is common for Colombian decaf. Each coffee card shows how it was decaffeinated where the roaster has said.

Three Llamas Coffee

Switch Espresso

Slow Coffee Roasters

Ryder Specialty Coffee

Slow Coffee Roasters
Not entirely. Decaffeination removes around 97 to 99.9 per cent of the caffeine, so a cup of decaf has a few milligrams compared with around 80 to 100 in a regular cup.
Green coffee is soaked in water saturated with coffee solubles, so only the caffeine moves out of the bean. The caffeine is caught by carbon filters and the water is reused. No added chemicals are involved.
Decaf beans are more porous, so they tend to extract faster. Start with a slightly coarser grind than you would use for the same brewer with regular coffee.