Air bubbles and pockets that form during the application of vinyl graphics are the bane of every sign maker's existence. With a bit of thought given to careful surface preparation and application factors, the ever-present air bubble can be remedied or prevented. Air bubbles form during normal application when air becomes trapped between the surface and airtight vinyl. Pockets form when foreign materials such as dirt, insects, residue or surface imperfections are present. While some sure-fire cures such as cleaning and wet application eliminate most problems, they are not always possible or desirable in every instance.
Apply wet vinyl application fluid in a spray bottle to the exposed application surface, if wet application is desired or warranted. Some sign makers use a soap and water concoction, but commercial sign fluid is inexpensive, does not contain possible detrimental ingredients, and helps promotes better adhesion as it evaporates.
Tape the cut vinyl graphic in place with a strip of masking tape acting as a hinge at the top. Flip the graphic up, exposing the application surface, and secure with small pieces of masking tape.
Remove the backing sheet from the vinyl graphic, and apply pressure with a sign maker's squeegee. The trick is to fold the graphic into a half-circle, and apply squeegee pressure to the top areas first, moving down. The squeegee will displace the application fluid from under the adhesive vinyl, taking the air bubbles with it.
Clean the application surface by applying a safe and suitable cleaning agent from a spray bottle. Glass cleaner, soap and water, or other mild cleaner with suffice for most surfaces. Wipe clean and dry thoroughly with a dry cloth or paper towel.
Work vinyl into seams, shallow cavities, or around rivets with a stiff bristle rivet brush or cleaning brush. The application of gentle heat to the vinyl with a heat gun or hair dryer may be necessary if seams, cavities, or rivets are large, or if the vinyl refuses to conform easily.
Slit or pierce stubborn air bubbles or pockets with a razor or needle tool, forcing air out with the squeegee. The slitting or piercing operation may be used for both wet and dry applications.
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