Placing static sensitive items on top of the static shielding bag, will they charge up and damage electronic components?
A: Commonly used anti-static shielding bags have a dissipative outer and inner layer with a thin metal layer in between. When picked up or placed on a grounded work surface by a grounded operator, the static charge on the bag is transferred to the ground. However, anti-static bags are not intended to be used as work surfaces, and it is not best practice to place ESDS on the bag after removing static-sensitive items from the anti-static bag.
The static shielding bag has an external resistance of < 1 x 10E11 ohms, which is a dissipative material, but is not suitable for use as a work surface as the work surface is limited to < 1 x 10E9 ohms per ANSI/ESD S20.20 Table 3. So shielding bags should be used to pack ESD sensitive items instead of placing ESDS items on the bags.