Astronomy: Making a Mirror | El Camino College | Torrance, CA
WEBHOW TO MAKE A MIRROR. Mirror and Tool. We start with a mirror blank. This is a round piece of Pyrex glass with one flat face (the bottom) and one face slightly shaped, but very rough. ... The four stages are rough grinding, fine grinding, smoothing, and polishing. During grinding, silicon carbide (SiC) grit is used much in the same way as ...