Silverpoint drawing is a method of drawing that dates back to the Renaissance.  I had the good fortune of studying under a professor at San Jose State University that revered this technique.  We spent the entire course on that one medium. 

The process requires preparation time and specific tools.  More than likely, a good amount of time will be spent executing your drawing.  I suggest that you invest in good quality rag paper.  You will also need a technical pencil, gesso, drawing board, rod of silver,  paint brush and sandpaper.  The silver need not be more than half an inch in length and can be purchased from a jewelry supply.  If you prefer to use copper or brass, that is also an option.  However, the latter two will be much softer and will wear faster than the silver.  Fine sandpaper will be needed to achieve a point on the silver rod.  Any abrasive surface will work for this purpose, but take caution that the grit is not too severe as to wear the rod down beyond use.  The opening on the technical pencil will accommodate the varying sizes of metal rods.

The drawing paper will be referred to as your support.  Experiment on a scratch piece of your rag paper to see the consistency of your gesso when applied with a mixture of water.  Create as smooth a surface as possible.  This will prevent ridges and uneveness in your drawing.  Complete drying of the support is necessary.  It is important to NOTE, erasures will not be possible.  Any mark placed on the gesso surface will remain and become permanent. 

Silverpoint or metalpoint drawing lends itself to technical rendering that requires very detailed and fine rendering of the subject matter.  Different diameters of the rods used will give wider and narrower lines as needed.  Pressure applied will indent the surface and may not be the effect you desire.  The charm of metalpoint drawing is the patina that time allows to take place.  As time passes, there will be a very gradual darkening of the strokes in the drawing due to oxidation.