I am doing some paint mixings involving quite precise proportions of paints. I am mixing my components in PP or PS (polypropylene, polystyrene) 60ml bottles, see: Bottles datasheet
Quite often, my hand attracts the bottle that sits on the precision scale, which is very annoying because it is nearly impossible to make a correct weight measurement in these conditions. The displayed weight for the empty bottle goes from zero to about -100mg when my hand goes near the top of the scale (the bottle is attracted which makes the reading negative)
Pictures of the scale in action without my hand, and with my hand:
See the video here: attraction
Is there any simple way to get rid of this? Any way to "discharge" the bottle (if the responsible cause is electricity as I guess it is)? What are the usual precautions to take in this case?