title_body: Using Arabica coffee beans for making instant coffee
upvoted_answer: The process should be quite the same. At least, according to this wholeseller's website.
  
  As far as I understand this company sells 100% Arabica or Robusta OEM instant coffee.
  
  For example, the well-known Nescafe has several brands for different blends. (I cannot reference these as they are based on many years of aggregated information of myself. I cannot even remember when I first hear some of them.)
  
  
  Nescafe Classic is pure Robusta, but this claim is hidden recently. Still, if you Google it with keywords as "%100 percent robusta Nescafe" you may see old web pages.
  Nescafe Gold is a blend, ratios are unknown.
  More recent Nescafe Dolce Gusto is 30% Arabica, 70% Robusta. So, I doubt the Arabica ratio of Gold is less than 30%.