edge fire polishing

[mikefromitaly]

Hello people
I have troubles in edge fire polishing

I use murano glass. I make plates in first firing, then i cut in small pieces with dish saw and the edge stay rough
Then i need to firepolish the edge in a new firing

I tried some times but the edges stay opaque? Maybe any help from antidevit on the edge? Maybe something wrong in the schedule?

Any help will be appreciated
thanks in advance

mike

[Kevin Midgley]

Keep cut glass wet.
Never let it dry out.
Clean edge with brush.
Wash well
Hand dry with towel.

[Brad Walker]

Clean edges before refiring. Use 600 grit grinder or 400 or better diamond hand pad on edges. Often the saw leaves rough edges that hold dirt and will not shine up easily.

If you provide your schedule we can give your our thoughts on whether that's also a factor.

[DonMcClennen]

I'd guess you should be firing at a higher temp.

[mikefromitaly]

Hello people
Thank you for your replies

My.schedule is
0-550 30 min
550 soak 15min
550-690 asap
690 30 min.
690-750 asap
Stop

I also tried to brush The edges with spray A but nothing
After cutting with saw i also try to use grind with a b dry belt to get less rough but nothing

Any help?
Thank you
Mike