👉 Mailing fluid, also known as postage stamp adhesive or printing fluid, is a specialized liquid used in the printing process of postal stationery to ensure that stamps adhere properly to their envelopes. It acts as a lubricant and bonding agent, allowing the ink to adhere evenly and securely without smudging or peeling. This fluid helps to prevent the ink from bleeding through the paper, ensuring that the printed text and images remain clear and legible. Mailing fluid is typically applied to the stamp before it is pressed onto the envelope, and its properties are carefully formulated to work optimally with specific types of stamps and paper.
