Quote:
Originally Posted by Satchmo
Hi Rod
TK-68 is a very old cerium - I'm not sure if its available any more. I used to use it - don't remeber it being particularly aggressive. if your surface doesn't clean up to a nice sphere quickly maybe your pitch is too hard and you are not pressing enough . I always use polishers on the soft side and get nice smooth zone free surfaces cold pressing fairly regularly. What kind of pitch are you using ?
Mark
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Thanks Mark
That doesn't surprise me I got it 16 years ago and I suspect my friend had it for several years before that. Good to know you found it ok. Do you recommend finishing with rouge? I have some I bought from willmann-bell. I found it needs elutriating or else you get lots of sleeks.
I am using gugolz pitch which again I have had for several years. I softened it with castor oil. The lap needs trimming every 3 or 4 hours so I assumed it was soft enough.
I think the zones were caused by too aggressive work by me to reduce a central hill - led to a deep depression. I am used to faster mirrors so have had to learn to be more gentle!
Rod