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• Human hands (If very dry)
• Rabbit Fur
• Glass
• Human hair
• Nylon
• Wool
• Fur
• Lead
• Silk
• Aluminum
• Paper
• Cotton
• Steel (Neutral)
• Wood
• Amber
• Hard rubber
• Nickel, Copper
• Brass, Silver
• Gold, Platinum
• Polyester
• Styrene (Styrofoam)
• Saran Wrap
• Polyurethane
• Polyethylene 
• Polypropylene
• Vinyl (PVC)
• Silicon
• Teflon