The tint is either very old or of poor quality. Most older films, even the top-quality brands, will discolor and turn purple. The bubbling is a result of a failure in the adhesive system that causes the tint to lift from the glass. If our tint ever bubbles, we will replace it at no additional cost to you, as part the manufacturer's lifetime warranty.
A dyed film is just as it says. The polyester window film is dyed in a submersion process that is absorbed into the porous material. This is the most effective way to ensure stable color and longevity.
Metalized films are created by a process called sputtering, which gives window tint high heat rejection. This is an advanced process that uses metals such as nickel, stainless steel, and aluminum that are "sputtered" on the surface of the film by charging the metal with ions and allowing the metal atoms to penetrate and uniformly bond to the film.
Hybrid films are created when layers of stable dyed film and metalized film are laminated together. These films offer the high heat rejection of metalized films with the smooth neutral look of stable dyed films.
Some truck and sport utility vehicles come from the manufacturer with glass that has been darkened using an electrical process called "deep dipping." This "factory tinted" glass is a dark shade but does not protect the interior of your car from the sun’s heat or damaging UV rays as well as after-market window tinting. Therefore, applying even very light shades of window tinting over factory tinted glass greatly improves protection against heat and UV rays.