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![]() But generally speaking, standard gummed envelopes do well in printers, as the water-soluble glue doesn’t typically clog printers. First and foremost, we suggest reading instructions for your specific printer and/or printing a sample. That depends on the type of envelope and printer in question. Can the Adhesive on Envelope Seals Ruin My Printer? When you flip up the bottom flap and fold down the top one, the adhesive bands are pressed together to form a seal. So to clarify once more, here at Blue Summit Supplies (an American company) we use the term “self seal” specifically when referencing envelopes that have a protective strip which must be peeled from its top flap in order to seal – AKA, “peel & seal.”Ĭonversely, a “ flip and seal” envelope has TWO strips of adhesive on both edges of the envelope’s opening. There can be a bit of confusion here, as some European office supply companies use the term “self seal” when referring to what most North American companies call “flip and seal.” Well… yes and no, depending on who you buy your envelopes from. “But I thought self seal envelopes were the same as flip and seal.” Latex can lose its adhesive properties over time, especially when stored in humid conditions, so it typically has a shelf life of 12 months after its manufacturing date. It’s recommended that flip and seal envelopes be used within 6-12 months of purchase due to the latex sealant on the flaps, which is a different material than the water-soluble gum used with other envelope seal types. Ta-da! It’s flipped, sealed, and ready to send.įlip and seal envelopes are unique in that they offer the convenience of self seal – no moisture needed – but with the added bonus of no extra waste, since there’s no protective strip to remove first.Ī word of warning about storing flip and seal envelopes. Then, fold down the top flap so that the two adhesive bands are pressed together. To close a flip and seal envelope, fold up the bottom flap to expose the adhesive strip. ![]() ![]() Long answer: Unlike self seal envelopes which contain a single strip of adhesive on the flap, flip and seal envelopes have a strip of latex adhesive at two locations: one strip on the top flap and one strip on a folded bottom flap, which runs along the open edge of the envelope. One downside of self seal envelopes: they are not recommended for use in bulk mailing machines since they're not equipped to handle the protective strip, which poses a problem.Īre Flip and Seal Envelopes the Same Thing as Self Seal Envelopes? To seal these envelopes, simply peel off the protective strip to reveal the sticky strip, then fold the flap and press closed to form a bond. Instead, self seal envelopes come with a sticky band of latex glue on the flap that is covered by a protective strip of paper or plastic. (No licking! No glue sticks! No yucky taste – hooray!) They’re a popular and easy-to-use alternative to traditional envelopes because, unlike gummed seals, self seal envelopes don't need to be moistened. Self seal envelopes are known by lots of names: peel and seal, strip seal, peel and stick, zip seal, or super seal. Once the mail is inserted in the machine, the glue on the flap is automatically moistened and pressed closed, leaving the envelope and its contents ready for mailing. Plainly put: they’re the least expensive!Īnother advantage to gummed envelopes is that they’re the best choice for use in bulk mailing machines. Gummed envelopes are the most traditional and widely sold because they are more cost-effective than self seal or flip and seal. After moistening, the flap can be pressed closed. To seal the envelope, the gum must be moistened by being licked, dampened with an envelope moistener, or moistened by a mailing machine. We should address this particular question from the start because there’s often confusion between gummed envelopes and self seal envelopes.įirst things first: they are NOT the same thing.Ī gum seal envelope, usually called a “gummed” envelope, has a strip of water-soluble glue, or gum, on its flap. In this post, we’re taking you to envelope seal school and exploring the difference between gummed seal, self seal, and beyond. It's easy to get around having to lick envelopes by using a tube of envelope moistener on hand, but what if you want something different and you're not sure what's best for your needs? You'd think the answer would be simple, but we actually get lots of confused inquiries about different types of envelope seals.
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