Archive for the ‘Types of lettering materials’ Category

Window Perfs

Monday, September 20th, 2010

With the popularity of vehicle wraps comes the issue of covering windows. The material used to cover a window so that the passenger’s can still see out is called perforated vinyl, or “perf”.

There are several ways to finish a perf film. Personally, I find that my regular laminate is more flexible on slightly curved surfaces than an “optically” clear material. The optically clear refers to the adhesive on the film. On standard laminate, there is a little “haze” that can be seen thru the decal. Having perfs on all of my shop vehicles, I do not mind getting used to the bit of haze.

Without a laminate, rain drops gather in the perforations making visibility difficult. I usually don’t laminate a driver’s side, side window, as the driver usually does not look out that glass, saving a bit of $$ on the print.

On a rear window, I tried both ways and DEFINITELY laminate.

Here are some rear and side window examples:

Experimenting with the use of the perf has brought some interesting results. All perfs must be trimmed at least 1/4″ away from all gaskets. Not sure why exactly, but I have a suspicion that the expansion and contraction of the perf, the glass and the heat absorbed by the gaskets all affect the perf and it peels up.

I have also experimented with cut-to-shape perf. It is not a full covering on the window, but cut to the shape of the logo and the edges sealed with a water-based varnish. I have used this method on a rear window with a wiper and after several months, the edges have not come up.