Why is the conductive ink in Britain so expensive, more than 300 bottles? Do you have a pen with conductive handwriting? 2B There is toner on the handwriting of the pencil. Can it conduct electricity?

If you don't pit imported products, who will pit you ... If you want to impose tariffs on imported products, the profit of middlemen will definitely be very expensive.

This should be ok, but it is not suitable for precision machining. Generally, it should be fine.

If you really want to use a pencil, use 6B pencil lead, its graphite content will be higher than 2B or something. Stationery stores sell them, but ordinary drawing pencils are not expensive either. ...