After the decaffeination process, these teas may still retain a trace of caffeine (the percentage of caffeine is not registered on tea specifications charts). Although it is not possible to remove all traces of caffeine from tea, there is still only a residual amount compared to regular tea.
TEALEAVES imports teas using the CO2 (Carbon Dioxide) decaffeinating process; steamed leaves are placed in a chamber then pressurized CO2 dissolves the caffeine. The CO2 is then removed from the chamber which is returned to atmospheric pressure, allowing the remaining CO2 to evaporate. There are no harmful residues.