Sorry about not updating yesterday, got called away from the lab. Today I only got to play with 1 job and the option available/chosen was lighter pressure and it doesn't look like I'll have much time to try anything else for the timing being. Anyways, onto my results.
Machine was flushed and water replaced with fresh water, slurry is used but stirred before use. Lens was rinsed and air dried and examined between each step.
1st Fine: P280 for 2 minutes @ 16psi on high, stock removal of 0.164mm
2nd Fine: 15um Optifilm for 2 minutes @ 16psi on high, stock removal of 0.016mm
Polish: Clearly Digital (3300G from PSI) + Maize HD Polish Pad from PSI, 6 minutes @ 16psi on high, stock removal of 0.016mm
Results were better than initial results posted but all 3 issues are still present. The amount of hairline scratches have been reduced but there are still present and still in the same pattern as reported earlier (circular). The scratches and swirls on the perimeter of the lens have been reduced, but still present as well. And finally the imprint of a pad is still faintly visible, but much harder to see.
So from this job I think it is safe to conclude that the hairline scratches are not handling scratches nor are they coming from the water. The slurry was only used for 3 jobs before this, so unlikely, but still a possibility for some sort of contamination.
And for the benefit of anyone unfamiliar with my 2nd step;
http://www.1-800-optisource.com/1-St...ge-Stripe.aspx.
Also this pad can be used for one step fining of CR-39 (I use a compensated version for this), I use it for 2 minutes @ 19.8psi on high followed by 6 minutes polish with the same conditions and no issues with CR, so polycarb is the only material (I only do CR and poly anyways) which these issues present themselves in.
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