The hard ceramic fragments of broken spark plugs are great at breaking tempered glass.
Ceramic breaking windows.
In part 1 we learned porcelain from a spark plug can break glass but what about other porcelain like a toilet.
This is a myth.
Uv rays are light rays that are harmful to the skin and can contribute to wrinkling sun damage and the development of skin cancer.
The ceramic could leave a scratch but that is all that would happen.
The impact of the shard against the glass creates a tiny structural failing which rapidly spreads the tension through the rest of the screen causing it to break.
It would also take extra effort before breaking windows coated with ceramic tints.
Ninja rocks are broken shards of spark plugs that are formed by smashing the ceramic portion of the spark plug with a hammer or other large object.
Once the crack gets started it quickly spreads ceramic stones can easily be concealed by thieves.
Spark plugs are made of aluminum oxide ceramic which is exceptionally hard.
Does this only work on auto glass.
Ceramic window tints can cost from a hundred dollars to almost a thousand.
The reason is that the small sharp and hard ceramic fragments induce scratches that pierce through the residual stresses of the glass.
Ceramic window film blocks approximately 99 of the uv rays that penetrate windows.
They have no traditional association with the ninja or ninjutsu only being named.
Among all the window tints ceramic window tints are the most expensive because of the benefits it has.
Several people have suggested that the charge of the glass and the ceramic from the spark plug create a spark that breaks the glass in an explosive way.
The direct force on a small area applied by the sparkplug ceramic is enough to punch through the safety glass which is designed to absorb great force over a large surface area without breaking.
Since they can quickly and quietly fracture the glass side windows on most cars ninja rocks have been used in smash and grab auto burglaries since at least 1995.
Disadvantages ceramic window tints can cost more.