What is“Soluble Coffee”?
1) That can be dissolved, especially easily dissolved.
- The American Heritage® Dictionary
of the English Language.
Retail marketed as "Instant Coffee",
it is the solubility of these coffees that gives them their distinction
over roasted and ground coffee. After green coffee is roasted
and brewed, the extract is then processed into various types of
Spray drying produces fine, rounded particles. Due to the cost
effectiveness of spray drying, the greatest variety of soluble
coffees is produced using this method.
Freeze drying involves the removal of water by sublimation through
freezing. This is a more expensive process than other methods
of drying, but produces a soluble with larger granules for a more
favored visual aesthetic.
Agglomerated soluble coffee is often described as somewhere between
spray-dried and freeze-dried. Produced using the spray drying
method, the fine particles are then gathered into larger particles
using a re-hydration process. This produces a visually more favorable
product, with a slight increase in solubility.