Is wood/paper ESD safe?

@pccheese no it is not. Anything that can hold moisture is prone to ESD. Paper is a very variable material and can be highly insulating when dry, but the moment it absorbs moisture (which paper readily does), the situation changes. So, neither one of those materials is ESD safe.

From the ESD handbook:

ANSI/ESD S20.20-2014 does not mention paper specifically it says the following about insulators:

Section 8.3.1 Insulators

All nonessential insulators such as coffee cups, food wrappers and personal items shall be removed from the EPA.

The ESD program shall include a plan for handling process-required insulators in order to mitigate field-induced CDM damage.

If the field measured on the process required insulator is greater than 2000 volts/inch and the process required insulator is less than 30 cm (12 inches) from the ESDS item, steps shall be taken to either:

A) Separate the required insulator from the ESDS item by a distance of greater than 30 cm (12 inches); or

B) Use ionization or other charge mitigating techniques to neutralize the charge.

If the field measured on the process required insulator is greater than 125 volts/inch and the process required insulator is less than 2.5 cm (1 inch) from the ESDS item, steps shall be taken to either:

A) Separate the required insulator from the ESDS item by a distance of greater than 2.5 cm (1 inch); or

B) Use ionization or other charge mitigating techniques to neutralize the charge.