what causes the plastic bag to wrinkle?

[sd2416]

I've been re-bagging some books that I've pulled from my auction find and garage sale find. A good amount of the bags are wrinkled. What causes the bags to shrivel up like Peter Parker in Spider-Man Reign?

[SilverRich]

I've been re-bagging some books that I've pulled from my auction find and garage sale find. A good amount of the bags are wrinkled. What causes the bags to shrivel up like Peter Parker in Spider-Man Reign?

 

They're not Mylar?

[sd2416]

no, just regular bags. I've just never seen any wrinkle like this.

[whisp]

Probably the plastic oils being soaked into the comics and drying out so the bags shrink and wrinkle. That would be my guess. No idea if I am right though.

[HOTFLIPS]

How old are the bags??

[towards2112]

How old are the bags??

 

Polypro vs Polyeth and the traditional NUTSAC WRINKLE debate.

Do a search in the forum archives for a loonnnnggg selection.

Then buy some Mylars or Mylites from MR Hotflips.

[sd2416]

How old are the bags??

? These are books I acquired here in the past few months. Just now getting around to sorting them and moving them into my collection

[sd2416]

How old are the bags??

 

Polypro vs Polyeth and the traditional NUTSAC WRINKLE debate.

Do a search in the forum archives for a loonnnnggg selection.

Then buy some Mylars or Mylites from MR Hotflips.

 

I would like to move all my books to mylites, but figure 9/10k total books would be a bit expensive. Probably something ill start at tax time in 09 and work on it during the year.

[towards2112]

Ok,

Do the polyethylene bags. They yellow up after 10 years or so, and if you

can find the old school 4mil? IE thicker ones, they seem to store better than

the polypro bags. I bought a store remnants selection back at the beginning

of the summer, some 20+ boxes, and canned about 40 lbs of nasty yellow

semi wrinkled bags and boards, but the bronze comics inside were in better

shape than the newer polypro bags. Sold quite a few nice white/offwhite

here to other forumites.

 

[Arrgh!!]

This guy would say shrinkage-

 

[ArAich]

They're probably too thin...

[General Zod]

When they start to wrinkle or yellow, it's time to throw them out and re-bag.

[G.A.tor]

heat and humidity

[Mutant Manatee]

Does anyone offer a bag pressing service?

[HOTFLIPS]

Any polybag, whether its polypropylene or polyethelene should be changed every 2-5 years. Same thing with backing boards. For long-term storage you put it in mylar with a full-back.

 

Jeff

[CKB]

I think the conventional wisdom is that moisture/humidity casues the bags to wrinkle. I don't think it takes much either. I've had bags look wrinkly in less thn 6 months.

 

[HOTFLIPS]

That very well could be also, i wouldnt doubt it can take that little of time for it to do something.

[djpinkpanther67]

I always thought it was the acids from the comic itself migrating to the bag that caused the yellowing/wrinkling

[Rich_Henn]

I have a dehumidifier in my basement, and I still have that problem.

[Ringfinger]

This guy would say shrinkage-