[Vocabulary] hand-pulled

[pinki91]

Hi guys

I have a question about the meaning of "hand-pulled", Can someone please help me?

This is the context :

This is our first renoir of the evening. This is a heliogravure, which is an etching. It was hand-pulled from a copper plate in Paris in 1919.

Thanks in advance.

 

[Matthew Wai]

http://www.meadowlarkgallery.com/photovsetching.htm Scroll down to 'What is a hand pulled etching?'

Not a teacher.