I've been lapping for the past 3 hours and can't get the mirror image i see everone get's. I've been lapping in straight lines, but all i get is real fine scratches on the HSF. the grid isn't the problem cause i have 12000 grid (yeah i'm that guy with the crazy grids ! ).
do i need to lap in circles at last or what... cause i can't seem to get the mirror image.... or do i need to polish it at last and with what ?
any help would be much apreciated ! if anyone want pics then ask so cause i got enough
1) Technique. Straight or reciprocal motions will typically produce a higher shine than circular motions. I actually prefer to use a reciprocal motion instead of circular, but rotate the sink ninety degrees every 15-20 strokes or so.
2) Materials. To what final grit level are you lapping to? The best shines appear at 1500 and beyond (or 10-15 micron).
3) Time. Some people simply do not spend enough time on a particular grit level to completely remove the previous level's scratches. And it your 1000 grit paper doesn't completely remove the 800 grit scratches, the 1500 certainly won't. :-)