I'm doing an experiment for school which involves measuring the temperature of batteries. I'm measuring the temperature using an infrared thermometer, and in order to get an accurate result I need the emissivity value of the surface that I am using the thermometer to measure. To be more specific, I am using a 1.5 volt Duracell battery with the plastic label taken off.
What type of metal is the casing made of? For example, if it is steel, is it galvanised, oxidised, sheet, buffed, polished etc?