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2005 self-adhesive stamp of Deutsche Post. (450 years after "Augsburger Religionsfrieden") A self-adhesive stamp is a postage stamp with a pressure-sensitive adhesive that does not require moistening in order to adhere to paper. They are usually issued on a removable backing paper.
The term adhesive refers to a sticky substance, while something that is self-adhesive implies that it will stick without wetting or the application of glue to the product. [ 2 ] One of the most familiar types of adhesive labels is the postage stamp, which was developed in Britain in the 1840s [ 3 ] and became popular in the United States within ...
Before postage stamps existed, people receiving letters would have to pay for them. The payment was based on how many papers were in the envelope and how far the letter had traveled. Rowland Hill came up with a solution of prepayment. This led to his invention of stamp gum in 1837. The world's first adhesive postage stamp was called the Penny ...
Adhesives may be broadly divided in two classes: structural and pressure-sensitive. To form a permanent bond, structural adhesives harden via processes such as evaporation of solvent (for example, white glue), reaction with UV radiation (as in dental adhesives), chemical reaction (such as two part epoxy), or cooling (as in hot melt).
The notion that spaced repetition could be used for improving learning was first proposed in the book Psychology of Study by C. A. Mace in 1932: "Perhaps the most important discoveries are those which relate to the appropriate distribution of the periods of study... Acts of revision should be spaced in gradually increasing intervals, roughly ...
A self-addressed stamped envelope (SASE), [1] [2] stamped self-addressed envelope (SSAE), [3] or stamped addressed envelope (SAE) [4] is an envelope with the sender's name and address on it, plus affixed paid postage, that is mailed to a company or private individual.
A padded envelope, also known as a padded or cushioned mailer, or jiffy bag in the United Kingdom, is an envelope incorporating protective padding to protect items during shipping. The padding is usually thick paper, bubble wrap , or foam.
Pressure-sensitive tape or pressure-sensitive adhesive tape (PSA tape) is an adhesive tape that sticks when pressure is applied without the need for a solvent (such as water) or heat for activation. It is also known in various countries as self-stick tape , sticky tape , or just adhesive tape and tape , as well as genericized trademarks , such ...