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Whether constructing a mailing at an office or home, you’ll need to seal those envelopes. Repeated licking of a multitude of envelopes is not the best practice. It tastes bad. The glue may or may not be safe to ingest. In large quantities? It is not a great idea. For efficiency sake, you may wish to purchase self-sealing envelopes but often that is not a possibility. Invitation envelopes tend not to be self-seal.
What other mass-mailings might you be doing that require fluid to seal them? Bill paying day? Birthday party invites? Shower [baby or bridal] or wedding invitations? Graduations? Mass mailings for the business in which you work?
- Use a clean household sponge. Dampen it with water and seal. This can have quality control problems, just as the envelope sealer may. You could release too much water and have a not-so-neat look on the back of your envelope. If you overdo it and you could even dampen the contents, as well.
- Use a cotton swab or Q-tip. Dip the end of the swab in a small bit of water in a cup. Lightly swipe across the edge where the gum is. Seal. This method is what I just used in sealing invitation envelopes for the bridal shower I hosted and, later, the wedding invitations. It works very, very well! Cheapest and neatest method I’ve found.