From: "Dave McCarter" 
To: "ATM" 
Reply-To: "Dave McCarter" 


> 5 micron brings your surfaces pretty close together.  Many first
timers
> have problems with scratching at this stage.  I have always believed
> this was due to the high likely hood of not being quite spherical as
a
> first time grinder.  I'd go to polishing.

If the surfaces are not quite spherical, then polishing is probably not
what is required. Make sure the edge is smoothly bevelled so that
microscopic glass chips don't cause large pits, and do a half hour of 5
micron, ensuring the drag is smooth and even at all angles around the
mirror with all angles of the tool. Only when it is can you move on to
polishing with confidence. That half hour will save you several of high
drag polishing.

Dave

--- BBBS/NT v4.00 MP