Nylon.
Yes ,the bristles and the handles of toothbrush are made of the same material that is nylon.
Yes ,the bristles and the handles of toothbrush are made of the same material that is nylon.
A toothbrush also has bristles.
All bristles are safe,
The capitol of a toothbrush (most important part) is the bristles. Why am I answering this?
Yes, a toothbrush can be used for DNA testing. DNA can be collected from the bristles of the toothbrush used by an individual and sent to a lab for analysis. This can be useful in situations where other sources of DNA are not available.
No
Helpful Friction.
I'm assuming that they are attached on a small board. I would expect the plastic of the toothbrush to be put over the board and the piece over the board would have holes to allow the bristles to come through the plastic.
it stands for the stiffness of the bristles but the lower the number the softer or harder?
No. The bristles of the brush will damage the soft tissue inside.
Typically, cheap toothbrushes are made from plastic handles and nylon bristles. Higher end toothbrushes might have wooden handles and boar bristles.