Instant coffee is crud imho but I suspect most people know that already.
Still it may still come as a surprise to some to learn how it is made.
There are two methods.
The first is “Spray Drying”.
You roast and grind coffee beans and then combine them with water to make a concentrated coffee sludge. Yep that’s right, your “instant” coffee has already been coffee ! What you are getting is second hand dregs in effect.
That coffee liquid is then pumped through fine spray nozzles into very hot air where the water element vapourises instantly and leaves just the dried coffee granules falling to the bottom.
The second method is “Freeze Drying”.
Once again the roasted coffee beans are mixed with water and cooked down into an extract. It is then chilled at roughly 20 deg F to make a kind of coffee slush puppy. . . nice !
It’s chilled again at a lower temperature until it’s a slab of slush puppy and then broken into granules. The granules then go through a drying machine in a vacuum which vapourises the water (ice) leaving the coffee granules.
Either way, your jar of “instant coffee” is nothing more than second hand coffee dregs which of course have lost a great deal of the great coffee flavour and caffeine that we know is in the original coffee bean.
To add insult to injury that lovely fresh coffee aroma that you smell when you first open a new jar and pierce the gold film seal, IS NOT THE COFFEE !
It’s an artificial aroma that is pumped into the jar at the last minute just before the jar is sealed.
Like so many things in life, instant coffee is yet another synthetic product that is far removd from the original product of nature. It is inferior in every important aspect.
Imagine taking freshly roasted and ground coffee beans and mixing them with hot water in a french caffetiere. After I take a cup out for a nice drink, I take the remaining coffee liquid/sludge from the caffetierre and pump it through a fine spray nozzle into very hot air to remove the water and create instant coffee granules.
Is that really what you want to be drinking ? !!!