It is very important that you cure the repair under pressure
in the sun or with a cure lamp for at least 10 to 15 minutes after the
injecting process. This lets the UV reflect in a start the resin curing
process. If the tool is removed to soon air may creep back into the bulls-eye repair
before it has time to fully cure. Curing under pressure prevents this from
happening. It is fine to slide the tool away and look to see how the repair is
filling, but only look for less than 10 seconds and the slide the tool back on
and continue to cure. You do not want direct sunlight or UV until you are sure
the air will not creep back in. The mirror helps the curing under pressure by
reducing the time and aids in being able to see the repair filling with out
sliding the tool away to look at the progress. If you slide the tool away and
you see the air which will show up black coming back into the bulls-eye repair
immediately slide tool back onto bulls-eye and continue to cure for another 5
minutes.