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Thread: chosera stones

  1. #1
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    chosera stones

    Good evening
    I am.wondering if anyone has had problems with either the 1k or 5k chosera stones? Both of mine have cracked in almost the same spot. They were not dropped or anything. Any. Help or info would be great since they are not cheap.

  2. #2
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    Have both for a few years with no issues, so sorry I cant help. Mine have been great

  3. #3
    Senior Member ThEoRy's Avatar
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    I have heard of chooseras splitting when permasoaked. The bonding agent softens and weakens when soared too long.
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  4. #4
    Senior Member zitangy's Avatar
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    Been using mine for almost 12 months. ( 1k Greencolor, and 5K grey)

    Most of the time, i leave it soaked for abt 8 hours each time as i wld empty the water trough only at the end of the day.

    Logically when it things cracks.. its either due to expansion or contraction. As for stones, I believe that it is the latter as it can only absorb water till the saturation point when it dries up it contracts adn hence the crack. Another factor factor could be the humidity level in yr area is too low. IF so.. it needs some juice.

    Hope that this helps in determining the crack of your problem.
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    d

    Slow drying ( natural air dry) wld be best as if the drying process is too fast ( near heat source) it may crack also..

  5. #5
    I think it says on the stone not to soak it for more than an hour.

    Most of them will develop the spider web crazing on the surface no matter how carefully they are dried, but in my experience this is not harmful.

  6. #6

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    They shouldn't be soaked for more than 1 hour due to the binder used, longer can weaken the magnesia binder and it's not reversible i.e; once it's happened, nothing will fix it.

    Drying needs to be gradual, and I would think that as you're in Arizona (Arid-zona?) it's pretty dry there, so drying nice and slowly might be a problem.

    Choseras are known to 'move' when wetted, and once wet they will expand and contract when dry. Rapid drying will force the outer surface to dry before the core has dried equally, and the dry outside may contract, causing stress cracks in the surface. It is not predictable when or if this will happen, but it's not unheard of either.

    If the stones are still usable, then use them. If not, I'm not sure what you can do other than try and ask where you bought them for advice and support.

    Sorry. It's the nature of these beasts.

    Stu.

  7. #7
    Senior Member Duckfat's Avatar
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    I've had the 1K for at least three years. No problems.
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  8. #8
    Senior Member EdipisReks's Avatar
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    what kind of crack? cracked in half? small surface cracks? i've had 2 1k Choseras, and both have developed surface cracks (crazing). if that is what you are talking about, it's my understanding that it's normal.

  9. #9
    I had my 5k crack in half.I never soaked them longer then 20 minutes and let them dry in the basement.

  10. #10
    Senior Member mpukas's Avatar
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    Quote Originally Posted by Schtoo View Post
    They shouldn't be soaked for more than 1 hour due to the binder used, longer can weaken the magnesia binder and it's not reversible i.e; once it's happened, nothing will fix it.

    Drying needs to be gradual, and I would think that as you're in Arizona (Arid-zona?) it's pretty dry there, so drying nice and slowly might be a problem.

    Choseras are known to 'move' when wetted, and once wet they will expand and contract when dry. Rapid drying will force the outer surface to dry before the core has dried equally, and the dry outside may contract, causing stress cracks in the surface. It is not predictable when or if this will happen, but it's not unheard of either.

    If the stones are still usable, then use them. If not, I'm not sure what you can do other than try and ask where you bought them for advice and support.

    Sorry. It's the nature of these beasts.

    Stu.
    Stu - just curious - is it possible to mount the Chosera stones on some sort of base, such as a peice of stone or composite counter top material (Corian), to prevent cracking in half? And if so, could a cracked in half stone be mounted on a base, flattened, and then used as normal?

    I've read about Chosera stones cracking from other folks. Your post makes a lot of sense as to why this happens - thanks much for the info! mpp
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