What is the ‘film to adhesive ratio’ and what is its relevance?
When discussing film composition and its thickness, the industry standard is to refer to ‘film to adhesive ratio’. This ratio represents how thick the film is and how thick the adhesive is that has been applied to the film. For example, the SEALJet Guard UV Gloss 10mil film has a 7/3 film to adhesive ratio which means that the film thickness is 7mil and the adhesive on it is 3mil thick. Thick coatings of adhesive add a slightly yellow tint to the film. Some profesional printers account for this through color correction before lamination to hit exact colors. The slight yellowing is not usually noticeable or a problem. For this reason, better quality laminates will have thick film and low adhesive ratio’s to provide optimum optical clarity.
