The act of sealing an envelope without using saliva refers to employing alternative methods to adhere the envelope flap to the body of the envelope. For example, this might involve using glue sticks, tape, or envelope moisteners to create a secure closure.
This practice is significant for hygiene reasons, particularly when processing large volumes of mail. It also addresses concerns about the unpleasant taste of envelope adhesive and potential allergic reactions for some individuals. Historically, reliance on saliva was commonplace, but evolving health awareness and practical solutions have driven the adoption of alternative methods.
