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question about using rouge for polishing

Started by BABOafrica, 10/13/2012 08:25AM
Posted 10/13/2012 08:25AM Opening Post
I'm making a 3.5" secondary mirror out of plate glass.

I cut three pieces of 6mm glass about 5" x 7" and ground them against each other in turns for about 4-5 hours total, working my way from #220 down to #800. The original glass piece was very old and had some minor scratches. The three pieces came out well enough with nice smooth surfaces. A very tiny pits here and there, but nothing I'mn going to fret.

I started using some rouge for polishing with a pitch lap (also a 6mm piece of glass for a base). It's my first time polishing anything.

The rouge leaves a general reddish hue on the glass that doesn't wash off. Is this normal? I've done about 10 minutes of polishing one of the three pieces and stopped.

I'm using rouge simply because it's all I have available currently.

Any experience on the matter?

Clears,
Joe

In lumine tuo videbimus lumen.

8O Home-made 10” Dob / Home-made 4” refractor

EPs: Konig 32mm (1.25") / Zhumell WF 30mm (2") / Nagler 13mm T1 / Orion Sirius Plossls 25 & 10mm / Zhumell Plossl 9 mm / Meade MA 9mm
Posted 10/13/2012 11:01AM #1
Rouge stains just about everything and is difficult to remove. A reddish coloration is normal for everything it comes in contact with. A good graade of rouge polishes slow but leaves a very low micro roughness surface..
Regards,
Dave
Posted 10/15/2012 06:32AM #2
The red will go away as soon as the glass is polished completely. Good luck

Eric
Posted 10/26/2012 11:21PM #3
I've been polishing with rouge. I don't seem to be getting anywhere. It seems to take hours of polishing for little progress.

Clears,
Joe

Attached Image:

BABOafrica's attachment for post 145867

In lumine tuo videbimus lumen.

8O Home-made 10” Dob / Home-made 4” refractor

EPs: Konig 32mm (1.25") / Zhumell WF 30mm (2") / Nagler 13mm T1 / Orion Sirius Plossls 25 & 10mm / Zhumell Plossl 9 mm / Meade MA 9mm