Yeah if a true vaccum applied AR coating is done like the gens and like how Chieftang has them done it should take fine steel wool and some elbow grease to remove it.
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Double AR coatings on Sapphire
- Thread starter davidsenjpn
- Start date
davidsenjpn said:
This is the same as how Panerai do it. Most genuine watches with single-sided AR don't coat the inside, meaning it's suicide to touch the inside as it will show a fingerprint for ever. Most curved crystals will be single-sided if they're prone to bashing.
Just an addendum to what Pug sez-
It's true that a fingerprint will be VERY visible on an AR coating. That's because the oil upsets the half-wavelength thickness of the AR layer, and in essence where the "finger oil" :shock: is, the AR effect is gone or modified.
HOWEVER, careful cleaning with GOOD lens cleaner and lens tissue, using the technique you'd use with a good camera lens, should clean the contamination off quite nicely, and can be done without destroying the coating. I've done this stuff on many restoration projects involving scientific optics, aircraft instruments, and the like. The key is to be gentle- it's a precision coating.
Comments welcome!
It's true that a fingerprint will be VERY visible on an AR coating. That's because the oil upsets the half-wavelength thickness of the AR layer, and in essence where the "finger oil" :shock: is, the AR effect is gone or modified.
HOWEVER, careful cleaning with GOOD lens cleaner and lens tissue, using the technique you'd use with a good camera lens, should clean the contamination off quite nicely, and can be done without destroying the coating. I've done this stuff on many restoration projects involving scientific optics, aircraft instruments, and the like. The key is to be gentle- it's a precision coating.
Comments welcome!
Yeah, don't do it, Davidsen. It's incorrect with regards to the genuine watches and it's an increased cost/pain in the butt.
although: if the customer wants double AR and then by all means Davidsen if you can do it, then do it.. but like everyone said it'll cost them more so the pricing n stuff is up to you
but if the buyer wants double AR, is willing to pay for the increased price, and you can make it happen
I don't see why not :twisted:
but if the buyer wants double AR, is willing to pay for the increased price, and you can make it happen
I don't see why not :twisted:
Hey if you can do AR Davidsen i have some crystals i would like to send you to get a double sided coating.
Proper AR should not scratch with your fingertips. My sunglasses have AR and they have been through hell: no problem. GF's eyeglasses too. Go to a Breitling AD and try a watch on. You will be the 100th to try it, touch it, and still see no scratch on the external AR. My IWC CD has double (in and out) AR, and has no problem either.
By the way, there is a very easy way to appreciate the effect of double AR: at certain angles, the glass will disappear. Completely. You will wonder if it fell off. You can see the hands exposed to air! No joke. That is the result of a good double AR. Once you've seen it, you can't go back.
The above doesn't mean that rep makers should start adding double AR to rolex submariners or to all panerai's. No rolex has AR, and no panerai has double sided, most panerai's have single sided AR, a few no AR at all. Now, if you can offer it, and people want it disregarding what the gen is like, then fine! This will not be the first time a rep is ahead of the genuine counterpart.. (mini-fiddy etc)
By the way, there is a very easy way to appreciate the effect of double AR: at certain angles, the glass will disappear. Completely. You will wonder if it fell off. You can see the hands exposed to air!
No joke. That is the result of a good double AR. Once you've seen it, you can't go back. The above doesn't mean that rep makers should start adding double AR to rolex submariners or to all panerai's. No rolex has AR, and no panerai has double sided, most panerai's have single sided AR, a few no AR at all. Now, if you can offer it, and people want it disregarding what the gen is like, then fine! This will not be the first time a rep is ahead of the genuine counterpart.. (mini-fiddy etc)
If by proper you mean coated, then yes. However, single-sided AR simply isn't coated.geo1nah2a said:
Just because your glasses don't mark doesn't mean every single AR treatment used doesn't mark.
Uncoated AR is better than coated, but gets damaged easier. So, what they do is use coated AR on both sides, hence double-AR.
pugwash said:If by proper you mean coated, then yes. However, single-sided AR simply isn't coated.geo1nah2a said:
Just because your glasses don't mark doesn't mean every single AR treatment used doesn't mark.
Uncoated AR is better than coated, but gets damaged easier. So, what they do is use coated AR on both sides, hence double-AR.
Thank you for the info.
Are the breitlings and omegas coated AR'd? I guess so, right?
Single sided panerai's? Any brave gen owners up to the test?
My guess is that they do both AR and coating since it will take down their defect rates.
The reason I am debating this is to prompt davidsen to ask his supplier to coat his beautifully AR'd sapphires. If he can do it, it will be one more extra feature in his great offerings. And some of the modder's that are supplied sapphires from him might be interested in them.
So he should make them both inferior and noticably different to the genuines? :shock:geo1nah2a said:
Panerai have uncoated single-sided AR, therefore DS should offer his sapphires as uncoated single-sided, no? Am I missing something here?
pugwash said:
No, you are not missing anything. I was
I didn't know panerai's AR is uncoated. Thanks for the education