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Examining complex-curve, graphic-application strategies, techniques and post-heating.
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By Rob Ivers
I installed my first vinyl graphics in 1978. Back then, I remember vinyl manufacturers instructing me not to stretch the vinyl. Vinyl has memory, they explained. After being stretched, it tends to gradually return to its original, unstretched shape. The vinyl pulls away from the surface, which causes failure.
They also said it was impossible to conform a flat vinyl graphic to a complex curve without stretching. So, they also instructed me to never apply vinyl to complex curves. They got no argument from me. Applying vinyl over those shapes led to wrinkles, stress and even migraines. I was happy to have a legitimate excuse to avoid them.
New rules
Fast forward to 1993, when vehicle wraps hit the market. From an installation standpoint, wraps differ from other vinyl-graphic applications because they require installation over complex curves. To quote a former Dodge truck slogan, the rules have changed.
Suddenly, it was OK to apply vinyl to complex curves. I didn’t quite know how to handle the sudden “policy” change. I knew for sure vinyl still had memory and would probably fail if I stretched it. No big deal -- if they insisted I stretch vinyl over complex curves, surely they wouldn’t hold me responsible for any failures.
Riiiight. This brings us to the present and my opportunity to share tips and tricks I’ve learned in the past 16 years of wrapping vehicles.
Vinyl-graphic films have certainly evolved. Such key improvements as repositionability and air egress have made installation easier. But vinyl still has memory. Have you ever seen a wrap with vinyl peeling? Or, worked really hard on a job, only to have the film lift?
If so, you’re not alone. Here’s what I’ve learned: You need a well-defined strategy that allows you to assess each situation and develop a plan. Mine is very simple: I know stretching vinyl can lead to problems, and I know I have to stretch the vinyl for complex curves. So, my strategy involves stretching the vinyl the absolute minimum amount required to conform it to the shape.
To the limit
It’s also important to understand vinyl possesses certain limits;, some shapes are simply too radical for its application. On the other hand, your strategy and technique can often make the difference between a successful wrap and one that lifts from the surface. To successfully implement my strategy, I rely on patience, technique, and experience.
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