Do CGC slabs need to "breathe"?
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11,395 posts

I acquired some sealable plastic bags to put over CGC holders. They have a sticky strip at the top and a flap to attach it to, so the CGC case is completely enclosed in 3 mil. poly material. (The CGC cases are delivered in similar plastic bags, but those are open-topped without a closable flap, and looser as well.) I got the bags because they make it easier to handle or stack the cases without worrying about causing scratches.

 

I'm curious, is there any downside to completely enclosing a CGC holder such that no air can get in or out of the slab? Does that accelerate the acidification process, or anything along those lines? Perhaps this topic has been discussed previously but I could not locate the topic/thread.

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I can see the potential for condensation risks if the slab is completely sealed. I'd keep it the way it is and allow it to breathe.

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Aren't the biggest culprits fluctuating temp and humidity extremes?

With the microchamber papers and a stable environment books should be fine, as long as they're not sealed up in something submersible, like vacuum-sealed bags or fire safes.

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On a similar note, do we have to switch out CGC holders after a couple of years? I have some old label CGC slabs and I'm worried that I might have to send them in to get re-slabbed.

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They breathe…breathe in the air…not even afraid to care...

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On a similar note, do we have to switch out CGC holders after a couple of years? I have some old label CGC slabs and I'm worried that I might have to send them in to get re-slabbed.

 

IMO, your books are completely safe in the old labels. They are also probably more valuable - old label goodness !

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On a similar note, do we have to switch out CGC holders after a couple of years? I have some old label CGC slabs and I'm worried that I might have to send them in to get re-slabbed.

 

Nope.

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I'm not sure there's been a long enough history with these slabs yet.

 

Everything looks honkey dorey now but who knows what happens 25-30 years from now?

 

And if the books not breathing inside the slab, couldn't that cause some sort of issue also? I dunno, just spitballing out loud here.

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I'm not sure there's been a long enough history with these slabs yet.

 

Everything looks honkey dorey now but who knows what happens 25-30 years from now?

 

And if the books not breathing inside the slab, couldn't that cause some sort of issue also? I dunno, just spitballing out loud here.

 

The CGC slabs aren't air-tight :shrug:

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Aren't the biggest culprits fluctuating temp and humidity extremes?

With the microchamber papers and a stable environment books should be fine, as long as they're not sealed up in something submersible, like vacuum-sealed bags or fire safes.

 

There has been extensive discussion on the boards about the dangers of storing comics, slabbed or not, in safes.

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3,356 posts
I'm not sure there's been a long enough history with these slabs yet.

 

Everything looks honkey dorey now but who knows what happens 25-30 years from now?

 

And if the books not breathing inside the slab, couldn't that cause some sort of issue also? I dunno, just spitballing out loud here.

 

The CGC slabs aren't air-tight :shrug:

 

Isn't the book in a sort of vaccum sealed type of plastic?

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19,908 posts
I'm not sure there's been a long enough history with these slabs yet.

 

Everything looks honkey dorey now but who knows what happens 25-30 years from now?

 

And if the books not breathing inside the slab, couldn't that cause some sort of issue also? I dunno, just spitballing out loud here.

 

The CGC slabs aren't air-tight :shrug:

 

Isn't the book in a sort of vaccum sealed type of plastic?

 

The inner well is made from archival-safe Barex, but it isn't air-tight.

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