Interesting. This seems more like a article written for commercial block lapping. I would like to see something wrote up for DIY'er blocks. The copper I get from my suppliers takes about a good 30mins of hard hand lapping with 220grit just to get the factory defects out of it. Another good 10-15mins per grit size up to 600grit, By the time I get through with the 600grit the grit is usually wore out to a point where it makes the finish smooth and shiny. That's usually where I stop.
This quote below leads me to belive I would be wasting my time going any further than that.
Quote:
This is a pointless exercise unless you have already done all you can to improve your cooling system. First, switch to water-cooling and get a copper block; if you are doing it yourself, use silver. If you are using a radiator fan combo, switch to evaporative cooling (See Here), use a chiller, and throw on one or two TECs, then put the evaporative cooler outdoors.
There are two reasons to polish a mating surface to within 100nm:
You are testing a new design and need to discount poor contact, or
You want bragging rights for having polished a 100nm surface yourself.
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