Electronics > Beginners

Truly antistatic bag?

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kcs:
Is there any way to verify if a bag or a bubble wrap is truly antistatic or is it just a regular bag (bubble wrap) painted with pink color without using any specialized tools like surface voltage meter etc?

As I understand, the key here is to make sure it does not build up a charge. Wiki says that a true antistatic bag should "conduct the charge to atmosphere", but it does not specify how quickly it supposed to happen.

How would you test it?

jeremy:
There are two kinds of bags: “static dissipative” ones (silver) and “anti-static” (pink/blue). Unfortunately these terms are sometimes used interchangeably. I don’t believe anti-static bags (pink/blue) are actually supposed to discharge any more than any other plastic bags, they just resist the buildup of triboelectric charge in the first place. So perhaps you could try to rub it on some wool and see if it holds a charge?

KL27x:
I believe the silver ones have highly conductive interior that acts like a faraday cage. I dunno what's in it. Maybe some fine foil between two layers of PE or something? They are very resistant to elastic and plastic deformation, and I have heard them called "metallized bags." But it might have been myself that dubbed them with this name.

I think they are all, pink or silver, coated with stuff to dissipate static charge.

Rick Law:
How about just wrapping it with aluminum foil?

Monkeh:

--- Quote from: jeremy on May 29, 2019, 01:42:42 am ---There are two kinds of bags: “static dissipative” ones (silver) and “anti-static” (pink/blue). Unfortunately these terms are sometimes used interchangeably. I don’t believe anti-static bags (pink/blue) are actually supposed to discharge any more than any other plastic bags, they just resist the buildup of triboelectric charge in the first place. So perhaps you could try to rub it on some wool and see if it holds a charge?

--- End quote ---

The pink bags are dissipative. The 'silver' (metallised) ones are shielding.

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