Ancient silver needle is how to make, can be how fine?

The so-called silver needle is nothing more than a statement, usually copper, iron needle. Even if the silver is not pure silver production, more copper, tin and other metals to increase the hardness.

The production method is different according to the demand for different thickness, different time and have different methods.

Remember the simplest method is melted into liquid and poured on the iron, stone plate wire drawing, to be cooled and then trimmed, but the yield is low, the thickness is not easy to ensure.

Later there are iron plate drilling wire drawing, this is from abroad to do the wire method.

In terms of the above two methods, also need to be cooled after grinding, polishing, etc., quite troublesome. So in some places there are also used bamboo and wooden needles.

Hairline-thin needles could do it, but there was no way to use them. Now it is possible, but there is no need to make them that fine.