Protected from abrasion and human contact in tubes yes.
In flips not so much, as more surface contact probable.
Environmental effect will readily appear in flips & tubes - toning.
This toning shows where an exchange of atmosphere occurs.
Even never opened Monster Boxes of SAE will show such after several years.
In order to reduce/eliminate toning, temperature control and vacuum sealed would be necessary.
From mints like Canada & Rwanda(Germany)sealed sheets do not tone.
So far these Lunar and Panda Privy series have not, look online.
2016 CDN 5 Blessings silver in sheets no tone European Mint.
My NWTM sealed 1,5, & 10 oz silver bars which have maintained the seal have not toned. The ones which showed breaches(improper cuts) in seal in 2009...
Wow toned where seal damaged.
Sheets for sale on eBad; CDN, Rwanda, China, etc 5-7 years old look new, no tone.
All of my metals are not in temperature controlled storage; the boat sank.
But are wrapped, tubed, ziploc bagged, & sealed box to reduce exchange.
Resale, on ten year old SAE tubes, sealed boxes, singles, etc is slow and low priced. The premium appears to be unavailable to small sellers. APMEX will buy at spot 2009 monster box, and sell with $6 +- premium. Therefore sealing Maples, SAE, & rounds, no profit gain long term.
Purchasing vacuum sealed from mint or dealer worth it... to an extent... if there is a numismatic bullion profile, Perth Mint, Rwanda, China Pandas, Libertads, Somalia Elephants etc, yes.
SAE's and Maples do not, and will not. Especially with market in hibernation.
So double ziploc and sealed container(glass does not breath, plastic does) any tube or flips you wish to have minimal toning. Vacuum seal 2x any you must or wish to protect.
I enjoy toning by placing on upper window sill in kitchen. Every time one cooks onions, sulfur is released and toning grows. Right now toning (5) 2015 1 oz Libertads. Takes 6 -8 months for golden centers, rainbow rims, and dark edges.
One must roll down the sill, flip and roll back on order to capture uniformly.
These are not mint, show hint of milk spots, so covering with gold tone and selling to tone worshippers... maybe.
To rid your silver of toning, buy E-Z-Est silver cleaner.
Follow directions, wear gloves, ready the rinse, and clean surface to place upon, and shiny returns 100%.
Great for silverware, rings(no stones) or dug silver relics and coins, like I find.
This product does not damage silver.
None the less, do not clean old numismatic coins.
I have and sold afterwards to dealer no problem or declaration of "cleaned" coin made by dealer.
Note: Do not dip silver in container, if you have dipped copper. Keep separate.