Most decaffeinated coffees use a chemical process. Most roasters use chemical process decaffeination utilizing methyl chloride or ethyl acetate (cleaning solvents). Those chemicals then go into your body when you drink the coffee. Critical pressure CO2 process is yet another method of decaffeinating coffee. Caffe Ibis, however, exclusively uses a water decaffeination process. Water process decaffeination uses only natural water pressure and carbon filtration to remove caffeine from the green coffee.