ThinkDon is our periodic Question and answer forum with expertise in the world of large format package printing by our VP of Manufacturing, Don Ellis.

ThinkDon - From Huston Patterson Printers

ThinkDon is our periodic Question and answer forum with expertise in the world of large format package printing by our VP of Manufacturing, Don Ellis.

What factors do we need to take into consideration when designing the coating layer for a printed sheet that will be applied or laminated to a corrugated structure and what are the benefits and drawbacks of leaving areas of the printed sheet uncoated?

When evaluation a project there are three basic areas to consider regarding coating on a printed sheet:

  1. Will the box or display glue in an area covered by the printed sheet?
  2. Will there be another item, such as a tear-off pad, glued to the printed sheet?
  3. Will there be a time-stamp or other information printed on the printed sheet after the initial printing?
Each of the above scenarios generally requires an absence of coating in those areas for proper adhesion.  The absence of a surface coating allows the adhesive to dive into the sheet.  In the case of imprinting information most printers require a more absorbent area for proper drying.

There are some adhesives that will work well over coating.  These adhesives should be thoroughly tested with printed samples prior to the job being printed.  

The most common down side to not coating an area occurs when ink is still printed in that location.  The ink loses the protection of the coating and will frequently cause a longer drying time before it can be handled.  

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