The protective closure feature ensures
the adhesive will not
come in contact with the contents of the bag when
inserting
or reusing the envelope .
Adhesive strip is on the body of the envelopeMajority of Scrapbookers have heard the term “acid and lignin free”, but what does this really mean, and why does it matter?
Acid free materials have a pH balance of 7.0 or higher. The pH scale measures how acidic or basic a substance is.
The scale runs from 0 to
14, with 7 being neutral. Anything with a pH less than 7 is considered
acidic,
and anything over 7 is considered basic. Lignin is a natural
occurring bonding element in plants that holds the
wood fiber together.
While lignin is not an acid, it does give off acids as it deteriorates.
Therefore if you have a paper that is only acid free, but still contains lignin, it will become acidic over time.
So why does all this matter? Simply put, acid and lignin cause paper to deteriorate.
A good example of this is newspaper. You will notice that
after only a couple of days, newspaper begins to turn yellow and
brittle.
The same will happen to your scrapbook and photographs over
time if the proper materials are not used.
These materials do not only include paper… adhesives, pens, markers, stickers, and anything else that comes into contact with your
photographs must be acid and lignin free.
Do not automatically assume that because an item it purchased in the
“scrapbook” section that it is photo-safe.
If it does not say “photo
safe”, “acid-free” or “archival safe”, assume that it is not.
A pH pen can be purchased to test the acidity of a product if you are not sure.
Our top selling Crystal Clear Flap Seal Envelopes
are ideal for art, photo, stationery, bulk mail,
craft & hobby, and just about anything else.
These envelopes have optimal clarity and durability.
Adhesive strip is on the flap. USPS Approved.
Details
Crystal Clear Body Seal Envelopes have the following features:
• Crystal Clear Optical Clarity
• High quality material will not easily rip, tear, wrinkle, or fog
• Acid and Lignin Free
• Archival Safe
• USPS Approved
• 1.6 mil thickness
• Adhesive on the flap allows you to customize the fit
• 100% blemish-free - 90 % virgin
polypropylene - 10% Recycled Content
• 1/16” size tolerance
• Envelope sizes indicates the opening side as the first dimension
Crystal Clear Flap Seal Envelopes have the following features: