Each forensic scientist confirmed that only substances containing nitrocellulose produced a positive result, and that the Griess test would only produce a positive reaction to nitrocellulose if conducted in a room at typical room temperature. When asked to comment on testimony delivered at the trial of the Birmingham Six, in which Dr. Skuse had stated that the temperature in a room in which the Griess test was conducted would need to be heated to 60 °C to produce a false positive reaction to nitrocellulose (thereby confusing the reading with nitroglycerine), one of the forensic scientists stated, "Frankly, I was amazed."