tumbling question

[judu]

got a tumbler and still in the learning process....some of the bottles are coming out great, just cloudy..like a milky cloudiness on the glass.or a fog......do i need to run the bottle again with a polish?.....

 

[chosi]

Probably yes.

When I use 1200 Grit, which is a fairly coarse cutter, the bottle comes out resembling a frosty mug just out of the freezer. To remove the "frostiness" I tumble a 2nd time with Aluminum Oxide for at least 2 - 4 days. 2 days is usually enough, but if you take it out after 2 days and it's still frosty looking, you may end up tumbling it a 3rd time and that's a lot of work. On the other hand, if you tumble it too long, it tends to get very "mirror-like", and some people don't like that effect.

When I use 1500 Grit (a less coarse cutter), I find that if I just let it go for 3 or 4 days, I don't need a 2nd tumble. The Jar Doctor claims that 1500 Grit will start out as a cutter for the first 24 hours and then end up as a polisher. That doesn't seem to work for everybody, but it almost always works out for me.

 

[judu]

thanks for the advise chosi... ill try using the 1500 and see how that turns out..

 

[AntiqueMeds]

dont forget to clean your copper and everything else well when you go from a cutter to polish.

 

[RICKJJ59W]

Tumbler? did some one say tumbler!!!??? !@#$%^&*[][:-]


Moe Larry the sleaze Moe Larry the sleaze !!!

 

[Diggin4Togas]

ORIGINAL: chosi

Probably yes.

When I use 1200 Grit, which is a fairly coarse cutter, the bottle comes out resembling a frosty mug just out of the freezer.  To remove the "frostiness" I tumble a 2nd time with Aluminum Oxide for at least 2 - 4 days.  2 days is usually enough, but if you take it out after 2 days and it's still frosty looking, you may end up tumbling it a 3rd time and that's a lot of work.  On the other hand, if you tumble it too long, it tends to get very "mirror-like", and some people don't like that effect. 

When I use 1500 Grit (a less coarse cutter), I find that if I just let it go for 3 or 4 days, I don't need a 2nd tumble.  The Jar Doctor claims that 1500 Grit will start out as a cutter for the first 24 hours and then end up as a polisher.  That doesn't seem to work for everybody, but it almost always works out for me.

I agree, But you may find it varries with different colors of glass. Takes a lot of time and documentation. Randy

 

[AntiqueMeds]

The hardness of glass can vary from the formula of the glass and the annealing process.

I was thinking about a way to tell if a bottle has unsafe stresses in it before spinning it (avoided the T word).
You should be able to look at the bottle through a polarizing lense and see stress points in the glass which would make it unsafe to polish.

 

[buzzkutt033]

that is very interesting matt. i've never " broken " a bottle spinning it, but there are a couple times that small, round " pressure " cracks developed. they are usually on the shoulder of the bottle where the glass is thinnest.

you really think we could see stressed area using polarized lenses ??

jim

 

[chosi]

ORIGINAL: AntiqueMeds
You should be able to look at the bottle through a polarizing lense and see stress points in the glass which would make it unsafe to polish.

If you have some glass with stress points, is it possible to take a photo of it through a polarizing lens, and teach us how to recognize such a thing?

 

[RICKJJ59W]

Moe Larry the cheese!!!