highly polished metallic surfaces such as copper or aluminum usually have an emissivity below 0.10
gravel, galvanised steel 0.28
styrofoam, stainless steel, roughened or oxidized metallic surfaces will have a much higher emissivity of around 0.6
fibreglass 0.75
cardboard 0.81
hardwood across the grain 0.82
snow 0.85
perspex 0.86
plaster 0.86-0.90
flat-finish paints are around 0.90
red bricks, PVC 0.92-0.93
glass, concrete, heavily rusted iron 0.92-0.95
food and organic materials, rubber, ice 0.95-0.97
standard black insulation tape has an emissivity of about 0.97
human skin, water and asphalt are about 0.98