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17 November 2008, 02:17 PM | #1 |
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Guys, stop with the toothbrush scratching gold or any metal nonsense.
The plastic fibers in the toothbrush are softer on the moh's scale of hardness than any metal and you cannot scratch something with an item that is softer than the metal being rubbed. Saying it scratches even when you are using it while it is wet with a mild detergent which will act as an additional lubricant is BS. Sorry, but I had to call you out on this one, its nonsense. |
17 November 2008, 03:36 PM | #2 | |
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Here's another example: should ordinary glass be able to scratch sapphire? On the Mohs scale, glass is around 5.5 while sapphire is around 9. By your example, sapphire should not be scratched. However, using a glass point WILL scratch sapphire, as a local Omega dealer will attest after challenging me to rub the crystal on the edge of his glass case. Using only light pressure, I made a slight scratch in his Seamaster's sapphire. Not huge, but it was noticeable. Very high point stress concentrations can be created by pressing through a glass point. This WILL scratch sapphire! Granted, the glass probably came out much worse in this, but the point is that the sapphire DID scratch. Something else to think about: if diamond is the hardest substance known to humankind, how are we able to cut diamond? By using diamond, of course! Both pieces of diamond have hardness of 10 Moh and will thus wear each other equally. Again, the point is that the Mohs scale is relative. It cannot be said that something will NEVER scratch something else...only how MUCH will it scratch! Back to cleaning gold: use a mild soap (NO DETERGENT!!! This causes seals to shrink - why risk that??) and warm water and you will preserve the high polish! SNB |
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17 November 2008, 10:08 PM | #3 |
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Although is doesn't say anything about it in my Rolex manual, my Omega manual says AVOID DETERGENTS.
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17 November 2008, 11:29 PM | #4 |
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the whole thing puzzles me? I have read countless pages on 904L steel used for the case and bracelet on my sports models....yet people suggest that a toothbrush will scratch it???
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18 November 2008, 12:49 AM | #5 | |
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There is in no way a possibility that a soft plastic toothbrush bristle will scratch a gold or any metal surface. Now somthing that gets dislodged during the cleaning (a grain of sand) may get lodged in the bristles and therefore cause the scratches but even then only if you use excessive force, but saying the bristles scratch is nothing less than pure ignorant nonsense and the spreading of uninformed baseless opinion. If that was the case, some of our synthetic sweaters that are essentially made from a thin form of threaded plastic should scratch the heck out of our watches in no time which again, is nonsense. Using a soft tothbrush is perfectly safe, using a mild detergent is safe and using water and detergent and a soft toothbrush used very lightly is perfectly safe. You are 100 times as likely to scrath a watch dry buffing it with a polishing cloth than even using water, soap and a TB. Anyone waving the red flag saying that this is unsafe for a watch with the durability and materials used in a Rolex is being overly neurotic and making up stories to back up pure ignorance and the lack of basic knowledge of the fundementals of metals. |
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18 November 2008, 02:26 AM | #6 |
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I place mine in some soda water and give it a bubble bath.
BTW, Is this moh? |
18 November 2008, 07:20 AM | #7 | |
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Also, if you are confident about your knowledge of Mohs scale, let's see a picture of a sapphire crystal being rubbed with garnet paper (pyrope, for e.g., that has a hardness 7.5 Mohs). By your assertion, there should be no scratching whatsoever. However, I bet you will see scratches. I would also suggest not making allegations that I have bolded in your quote. SNB |
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18 November 2008, 12:33 PM | #8 | |
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Are we talking about diamonds here? No... So you point is moot. You arguing about sand paper scratching a synthetic Sapphire crystal has no comparison to a nice and extremely soft plastic bristle toothbrush scratching metal which is nonsense. Plastic CANNOT SCRATCH METAL. Something embedded in it can, but plastic itself scratching metal? Comon now, are you seriously trying to push that opinion across? I'd hate to see what it would be doing to your teeth. I don't think they make toothbrushes that scour your teeth and remove tooth enamel. |
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18 November 2008, 12:40 PM | #9 |
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As a general proposition I don't agree. Take a plastic ruler or object and run it across the brushed finish of your lugs, or case, you can definitely mark it.
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18 November 2008, 12:47 PM | #10 | |
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Plastic cannot scratch metal. It is physically impossible. Now sand or material being caught into the toothbrush will do it, but not the bristles themselves. This is like saying a car wash mitt is scratching your paint when it is actually the material caught in it causing the swirl marks. I just did what you said and there was a mark, but under the microscope it is the ruler leaving plastic on top of the metal, not scratching into the metal. The plastic them wiped off with no mark after a small rag with some alcohol on it. this is because the metal is harder that the plastic. You would see the same mark on a ceramic plate if you rubbed a piece of metal on it. Until a hand lnse the mark is metal leaving a deposit on the ceramic plate, not scratching into it. Its kind of like the use of a pencil. |
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18 November 2008, 02:32 PM | #11 | |
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In fact, it is your situation that is not relevant: tooth enamel has a highly irregular surface that unevenly reflects light. On such a microscopically coarse surface, a few additional scratches will neither harm functionality nor appearance. This is totally different from a highly polished gold surface that will show very fine scratches quite readily. Again, we are talking about scratches that may be as little as microns deep. At best, teeth have mineralization ridges in the order of tens, if not even up to 100 microns or more. By your logic, why not use copper wire (3 Mohs) to brush your teeth (4-5 Mohs)? Copper wire is softer, so it should not scratch your teeth, right? My initial point was that nothing is scratchproof and that we have to consider factors (such as point stresses) OTHER THAN hardness in assessing whether scratches will form. Regardless...your watch is your's, and my watch is mine. We can each do what we feel like as long as it doesn't harm anyone else. SNB |
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18 November 2008, 02:57 PM | #12 | |
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the topic at hand is, "You cannot scratch you watch with a soft plastic toothbrush." PERIOD Plastic is softer than metal, PERIOD Therefore it cannot directly scratch any metal. If that was the case, we could use a sharp ruler to cut a block of steel or gold which is just nonsense. |
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18 November 2008, 12:16 AM | #13 | |
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How could detergent make the seals shrink,how could the detergent find its way to the seals,if the crown is screwed in the watch should be water and detergent proof.And if you rinse watch fresh water,all the very small residue of any detergent left will be gone.
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18 November 2008, 03:00 AM | #14 | |
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18 November 2008, 05:23 PM | #15 | |
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30 September 2010, 03:25 PM | #16 | |
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No, it's not nonsense at all, but rather 100% fact. A toothbrush, no matter how soft will absolutely put hairlines on highly polished gold surfaces as well as silver and even highly polished stainless if you repeat it often enough or scrub hard enough. Even lightly rubbing polished gold with a coarse dry cloth will hairline the surfaces. As a coin collector, I can't tell you how many otherwise very valuable coins I've seen completely ruined by people 'cleaning' them with a toothbrush or a rag or whatever and completely destroying the original surfaces. As far as not being able to scratch something with an item that is softer......have you ever seen how easily a diamond can become scratched through careless handling or cleaning?
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