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8 inch, F/6 - Correction and Figuring

ATM mirror making
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#126 dogbiscuit

dogbiscuit

    Apollo

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Posted 22 October 2020 - 10:05 AM

Ahhhh!    You will be happier with scratches removed.  smile.gif
 
When you get back to polishing consider TOMDEY's post # 3 comments in this thread.
https://www.cloudyni.../#entry10600582

 

 

>Platinum Credit Card
>Sense of Urgency
>Triple Strength
>Ageless Male
>Tac Glasses
>Whiter than White
>HCF Lap
>Super-Polishing --- sure sounds like meaningless marketing bunko-speak to me.

The grinding mechanism is controlled fracturing to remove material, and well-understood. But polishing remains a substantially black art, to this day, despite contrary claims. Bringing a surface from fine ground to fully-polished requires at least a min energy per unit volume to break the bonds. The glass actually flows, at the molecular level... rather than breaking off in macro-chunks. Therefore, the species of polishing compound and lap type hardly enter into the total work (energy) you must expend to bring the surface to book. Indeed, when polishing is going well, the drag force is substantial... because force x stroke distance is energy. That smooth but viscous drag indicates that polishing is occurring at the max possible rate. And, depending on the substrate material... it may take miles or more of total integrated viscous stroking to attain ~full polish~. No free lunch... "Super-Polishing" is Mumbo-Jumbo.

I have noticed that most newbies frenetically polish... too fast in the strokes, with terrible contact and the glass scooting over the lap like they're auditioning for shoe-shine boy at Grand Central. That manic air-puck Dervish motion looks cool, but is hardly polishing at all. It's the slow, deliberate, Sugar Daddy Drag that does the trick.    Tom

We know no more about polishing than this guy did... back in 1926 >>>

Ehhh... Other tha that... it is said that wearing a Lab Coat helps a lot!

 https://www.cloudyni...02975_thumb.jpg


Edited by dogbiscuit, 22 October 2020 - 10:09 AM.

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