Happy new year everyone. There is a lot discussion on forum already on how to store your precious coins. But what about coin rolls?
What is the best way to store them? Keen to hear how people are keeping them safe in good condition for the long term.
If it were me I would not store coins especially decimals in paper rolls.
It will affect the coins long term.
My guess is that modern alloys will look ugly eventually.
There's got to be a good way short of cracking them open?
Heat sealed plastic bags is one way to store rolled coins.
Thanks Goldseeker :good:
Is polythylene safe for coins?
http://www.officeworks.com.au/shop/officeworks/poly-bags-250mm-x-450mm-x-25um-pk-100-iti434
It would go nicely with something like this
http://www.ebay.com.au/itm/NEW-Heat-Sealer-200mm-for-sealing-plastic-bags-Warranty-/370587011836
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OK looks like I need polypropylene. This stuff is tricky. :dodgy:
I have been using the small plastic bags that one can get from the bank that holds the coins.
Quote from: 'Goldseeker' pid='64640' dateline='1420017838'I have been using the small plastic bags that one can get from the bank that holds the coins.
Oh OK. That's a good idea. :P
The expert who would give half a page of storage comments is currently very ill in hospital. If he was able he would certainly put you onto the correct path for storage.
I just can't find his previous comments that he has made on the forum re this subject.
Very sorry to hear that. Hope he gets better soon. :(
A previous post mentioned this link...
http://www.home-museum.com/howto/HowToArts/Materials/materials.htm
Quote from: 'Goldseeker' pid='64662' dateline='1420068864'The expert who would give half a page of storage comments is currently very ill in hospital. If he was able he would certainly put you onto the correct path for storage.
I just can't find his previous comments that he has made on the forum re this subject.
Hehe... read the story of what happened next, Goldy. I'm home though.
LDPE (what the bank bags are made of) is fine, BUT it turns out not to be 100% impervious to gasses. As I found out when my coronation bags turned green after lying on a foam pillow for months.
What I would do is, individually seal the rolls in LDPE, then put the rolls in a thick Armaguard LDPE sack, then seal THAT in a chip bag. Preferrably after you hose the crumbs out of it of course.
Chip bags are multilayer BoPET (Mylar), with printing on the inside and an aluminium layer in the middle. So they're kinda like helium baloons, and you know how long it takes Helium to escape from THOSE.
PET would work, but is rigid of course, as in soft drink bottles. Polypropylene or Acrylic would be great, and there are tubes made out of those, but they're not cheap. So the freebie multilayer approach is the way I'd do it. The way I DO do it in fact. ;)
I knew you would respond Fulvio, thanks.
Trust you are getting better.
back on track now.............
Very impressive research Fulvio. :) And glad to hear you are feeling better.
My heat sealer has arrived from eBay. I have been busy sealing my rolls in coin bags from the bank. Also purchased some Polypropylene bags and sealed the bank coin bags with coins inside as well. The mylar bags have yet to arrived. Might be over doing it - 3 layers!
Have been playing with the heat sealer. Sealed the $1 Terra Australis folders in the Polypropylene bags. Looking very professional. :P
(http://www.australian-coins.net/gallery/albums/userpics/11226/20150107_232132.jpg)
Quote from: 'kchan1111' pid='64997' dateline='1420634114'Looking very professional.
Very. What did the PP bags cost you?
$11 for 100 + $4 shipping, a generous 155x230mm or A5 size. If you are careful you can individually sealed 3 of the RAM size coin folders into a single one. Here's the link.
http://www.ebay.com.au/itm/221626530545?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
The title says cellophane (which is a wood) rather than polypropylene (crude oil). Yeah I looked it up! But the seller assured me it's polypropylene because everyone searches for cellophane. Other sizes available from same seller.
I don't eat chips so I didn't want to spend $2 just for leftover bag. Here are the Aluminium mylar bags:
http://www.ebay.com.au/itm/171445178666?var=470478953575&ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
OK Fulvio you appear to be the expert.
What is your opinion of using the Aluminium Mylar Bags as indicated above for the storage of coins?
Quote from: 'Goldseeker' pid='65011' dateline='1420676022'OK Fulvio you appear to be the expert.
What is your opinion of using the Aluminium Mylar Bags as indicated above for the storage of coins?
Good question.... I just figured they'd be the same as chips bags. No?
Looking at it - I think its too hard to work out if it's OK or not. I mean mylar is fine. What about aluminium? It's bad idea to wrap coins with foils alone. Who knows what other substance is in it. I might seal a few normal coins as an experiment first. Better be save than sorry.
Quote from: 'kchan1111' pid='65018' dateline='1420677745'Quote from: 'Goldseeker' pid='65011' dateline='1420676022'OK Fulvio you appear to be the expert.
What is your opinion of using the Aluminium Mylar Bags as indicated above for the storage of coins?
Good question.... I just figured they'd be the same as chips bags. No?
Pretty much, yes. The main difference is the printing, obviously.
The film is multilayered, with ink and metal in the core, which is why you can heat-seal them. And the combination of mylar and metal stops pretty much anything getting through, unlike say LDPE, which as I discovered is not 100% impervious to corrosive gasses.
Of course, the big downside of metallised bags is that they're not transparent. And without the metal, the film is not impervious. :(
Quote from: 'kchan1111' pid='65050' dateline='1420714067'Looking at it - I think its too hard to work out if it's OK or not. I mean mylar is fine. What about aluminium? It's bad idea to wrap coins with foils alone. Who knows what other substance is in it. I might seal a few normal coins as an experiment first. Better be save than sorry.
No, you wouldn't want to wrap coins in foil. But keep in mind that metallised film is two layers of mylar with foil
(and possibly printing) in between. So you don't have metal to metal contact.
Good stuff. Thanks Mr Fulvio!
Found this thread again after searching for chip bags. ;)
I went shopping in between picking up my coins at the post office and crashing the car (Panelbeater has booked it in for 4 days on the 28th BTW), and I picked up 5kg of cocktail franks for $15! Half price, no less.
Anyway, obviously we're not going to eat that lot in a couple of days, so I figured I'd better go on a hunt for dad's missing Aldi Vacuum Sealer. Finally found it, but he had no bags! And it was getting a bit late to nip out and throw fifteen bucks at Aldi.
SOooo I figured I had nothing to lose with the chip bags, right? I've been stockpiling these things for a couple years now, pending future research, and I reckon this qualifies as research.
It mostly worked like a charm. 8 snags across the bottom of the bag, fold over, put another 8 in, and if its a long bag, fold over and get another 8 in as well. Stick it in the sealer, lock it down, make sure the snags are lined up right (I plan on putting a seam across in between the 2 or 3 rows later, so we don't have to cook 24 in one hit), and push the button. In a couple of cases it went straight to seal, probably because the bag had a pinhole in it. But those just went in the fridge to be used this week, while the rest went in the freezer.
And then... :diablo:
I was thinking about cooking a bag unopened (yes, it works very well, actually.. tried it for lunch), and the mind wandered to microwaves. Hmmm.. what would happen if you put this stuff in the microwave, I wonder?
Enquiring minds NEED to know!
I'm not going to bore you with pics, cos basically I didn't take any. But a couple of square inches of chip bag for two seconds was both more and less impressive than a CD! Less impressive because you don't get the sparkly little fireworks shooting off, but more impressive because the aluminium flashes into vapour instantly, has nowhere to go, so explodes out of the plastic. Blink and you miss it. And you end up with a shrivelled up piece of hard plastic, kind of like dried-up orange peel.
Try it. Its kinda fun. ;)
Now the plan is to try it with a variety of other films I have lying about, and see if I can finally sort out the perfect coin solution. :)
Quotewhat would happen if you put this stuff in the microwave, I wonder?
If you asked me I would have strongly advised against it. Big LOL before I even read further.
Having done the CD thing years ago, I kinda knew what to expect. ;)
It's No wonder your Dad hid the sealer , After seeing what you do with the microwave :angel:
Have you had a crack at the zip seal bags yet Mate, I ran out of mine bagging a 10kg box of prawns the other day :dash1:
What materials are these vacuum sealer bag rolls made out of? I have looked through many online they simply said BPA free.
Quote from: 'kchan1111' pid='100951' dateline='1478257962'What materials are these vacuum sealer bag rolls made out of? I have looked through many online they simply said BPA free.
I don't know what the plastic is but it doesn't have that PVC "Smell" to it :ok:
Quote from: 'trout' pid='100954' dateline='1478258599'Quote from: 'kchan1111' pid='100951' dateline='1478257962'What materials are these vacuum sealer bag rolls made out of? I have looked through many online they simply said BPA free.
I don't know what the plastic is but it doesn't have that PVC "Smell" to it :ok:
Is PVC the only bad plastic you need to watch out for? I see bags and containers that say no PVC but that doesn't mean it is made out of "safe" plastics right?
Fulvio is the "Go To" Man for plastics Mate.
He did explain the vaccy bag plastic to me once and I am pretty sure there is nothing coin nasty in it :ok:
remember years ago when the pckets came as shrinkies or something and you'd pop it in the microwave an it would shrink? kids thought it was great
https://youtu.be/-Bcfp5_8bz4
works better in an oven
https://www.madaboutscience.com.au/store/index.php?main_page=page&id=45
Quote from: 'kchan1111' pid='100951' dateline='1478257962'What materials are these vacuum sealer bag rolls made out of? I have looked through many online they simply said BPA free.
We covered this in another thread recently. They're a sandwich. LDPE on the inside for easy sealing, and PA (polyamide, AKA Nylon) on the outside for strength. There may also be extra layers including metal and/or printing.
Quote from: 'robbiegal' pid='100960' dateline='1478262274'remember years ago when the pckets came as shrinkies or something and you'd pop it in the microwave an it would shrink?
PS (Polystyrene)
http://www.csiro.au/en/Education/DIY-science/Chemistry/Shrinkie-Shapes
Quote from: 'kchan1111' pid='100955' dateline='1478260020'Is PVC the only bad plastic you need to watch out for?
Pretty much, yeah. Because PVC is naturally hard and white, and they add plasticisers to make it soft and clear. The plasticisers leach out over time, and basically soak your coins in acid.
That said, there are all manner of coatings applied to food packaging, basically to kill bugs and not people. Some of these antimicrobials may not be something you want around your coins long term. Just like you don't want timber products including cellophane around them either. Just stay away from organics entirely to be safe.
PET, PP, LDPE, HDPE and the 'hard' plastics are safe, but if its a bag that came with meat or fish in it, and it feels slimy, I'd avoid it. I'd also avoid PS, because its pretty fragile, and not pretty when it breaks down
(try pouring some acetone into it! :diablo:)The other thing to consider is gas and moisture permeability. LDPE, as I found out very expensively, lets both through really really easily. PET and PP are the best of the films, generally in Biaxially-Oriented form (BoPP, as in album pages or BoPET, aka Mylar, as in 2x2's, Saflips and the like). A BoPET mount in a BoPP page is probably as good as you're going to get, unless you add a metallised layer, as in the legendary Chip packet! Not exactly see-through though. ;)
Quote from: 'trout' pid='100957' dateline='1478260309'I am pretty sure there is nothing coin nasty in it :ok:
Quite so. See above. :)
QuoteHave you had a crack at the zip seal bags yet Mate, I ran out of mine bagging a 10kg box of prawns the other day :dash1:
Ziplock bags are LDPE. Which I no longer trust for long-term storage unless enclosed in something else that's more impervious.