robbiejohn
starting to shine!
Member since July 2010
Posts: 36
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Post by robbiejohn on Aug 17, 2010 0:56:10 GMT -5
Hi friends, I'm still on the steep learning curve and it's coming along nicely due to your many helpful postings. I have a Lortone 33B and a double barreled Lot-o vibe. Decided to be frugal and use only beach stones for my first batch. The ocean has done stage one, but I gave them a week in the 33B with 60/90 anyway. Then 220, 600, pre-polish and polish in the Lot-o. Today, after 24 hours of polish in the Lot-0 I was blown away by the wonderful shine on many of the stones---granite as shiny as tombstones! Still, about 50%, though shiny, are less brilliant than the other half. I've put them in for another twelve hours or so to see if there's any improvement. My question is about timing. Is it likely to harm the brightest stones if I leave them in for this extra time---or even for another 3 or 4 days if necessary to shine the duller stones? I've seen some formulas that talk about up to 6 days in 'polish'. Would be most grateful to receive some help on this. I'm amazed at my 'Lot-O'. I'm having more fun then in may years. Thanks to all of you for great advice and wonderful pictures. I'll post some as soon as I learn how. I think even my beach stones will qualify for jewellery when we get to that stage. In the meantime, I'll be out the beach for more 'pre-shaped' stones soon. Thanks to all for your help. RobbieJohn.
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Post by Jack ( Yorkshire) on Aug 17, 2010 2:19:08 GMT -5
Great to hear of your results
Hi Robbie-John,
Good to hear of your results The Lot"O" sure makes a big difference in time and money in economy of grit eg (1/2 tea spoon ) !! You will find some stones dont shine often the more softer ones
I have been told go back 2 stages when re polishing
I usually do 220, 400, 600, 1000, tripoli, polish (I notice you missed out 400 ? its a big jump from 220 to 600 ? )
I use a pocket knife to test if it is hard or soft (leave on beach)
Im sure others will add their comments
Have a good day
Jack Yorkshire uk
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Post by susand24224 on Aug 17, 2010 10:45:30 GMT -5
I *rarely* use a vibe, so can't give general advice. However, if your stones are varying hardness, the harder ones will polish and the softer ones won't. As long as you leave the harder ones in, the softer ones won't polish. I generally take out the ones that don't polish (when I don't know what I am tumbling) and hold on to them until I have enough to do a full load with the nonpolishers. In the alternative, you can add a filler to get a full load with less stones, such as ceramic media. Finally, I agree with Jack--some stones will never polish no matter what.
Susan
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revco
starting to spend too much on rocks
Another Victim Of The Rockcycle
Member since February 2010
Posts: 162
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Post by revco on Aug 17, 2010 17:07:16 GMT -5
I'm not a vibe guy either, but in rotary, I haven't found much of an issue with excessive polish times. Sometimes I've left 'em in for 2-3 weeks+ without trouble. The only risk, really, is that it's more time that the rocks could develop problems - but as long as you have a proper load and good media loads, you should be fine there.
As for the partial polish, you didn't really say much about the types of rocks, other than beach rocks. It's usually best to work with particularly harder stones - notably MOHS 6.5+ (the rock hardness scale) - because a lot of softer stones have trouble taking a polish. For the most part, you can easily test stones by trying to cut them with a decent, serrated steel blade. If you see a scratch, it's probably too soft to tumble easily. If not, you should be in good shape. Hardness is a key to getting a good polish across all your stones - I find that I can usually get 98%+ success rates with stones that are in the neighborhood of MOHS 7.
Hope that helps! Good luck!
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,503
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Post by Sabre52 on Aug 18, 2010 8:40:56 GMT -5
I shape my stones in a rotary and do the finishing steps in a vibe. Leaving them in longer usually just improves the polish unless you don't use pellets and the larger stones are knocking the smaller ones around too much. That can cause hazy areas and chipping. Some stones due to porosity, structure. softness or mixed hardness composition will never polish period. You'll learn to spot those after awhile.....Mel
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