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ESL Diaphragm coating
ESL Diaphragm coating
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Old 21st January 2012, 07:19 AM   #521
arend-jan is offline arend-jan  Netherlands
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Do I understand correctly that the 6300 coating stops conduction within 2 years? Because if that is the case, why would anybody would want to use it?
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Old 21st January 2012, 11:03 AM   #522
alexberg is offline alexberg
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Quote:
Originally Posted by arend-jan View Post
Do I understand correctly that the 6300 coating stops conduction within 2 years? Because if that is the case, why would anybody would want to use it?
NO you DO NOT!
With all do respect: Murphy Laws are immortal... or my English is that bad???
Liquid coating as shipped in bottled, canned...or otherwise VESSELed form is good for at least 6 months, after it was opened.
In 6 months, for very least, after unsealing, coating (liquid) becomes not good: i.e. it would not conduct, when dried. It's either sedimentation or coagulation or polymerization in volume... who knows. It dries in contact with air or moisture in the former. So, if you open the bottle, you let the ultimate curing agent in...
that is not the case for pressurized (aerosol) cans: nothing gets in when you start using the product.

BTW

#6300 in aerosol can is called #6500
Licron in bottle is called 1756-G

Dried (polymerized, cured... whatever) lasts for undetermined period of time
(at least 2years, by my experience)
P.S. I was quite hesistant to put out an exact information... now you understand why.
P.P.S. I doubt that bottled 1756 lasts any longer than 6300

Last edited by alexberg; 21st January 2012 at 11:09 AM.
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Old 21st January 2012, 06:16 PM   #523
Atom666 is offline Atom666  Canada
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Quote:
Originally Posted by alexberg View Post
Why would one expect that self-polymerizing one component varnish gonna be good forever? It's not saline...
Seems that any hermetically sealed product is the proper one...
Water based product can be shipped by air - that was 1st decisive factor for me. Water based product dries much slower and I would never change such a convenience for a shelf life.
There are better materials as well - you would not like the price
On the other hand, also it's a stretch, would you use expired food?
What's with the hostile attitude?? I'm not attacking you. Forgive me if I'm not up to scratch on my chemistry. I asked a simple question and got a condescending answer.Nobody holds you personally responsible for the fact that 6300 has a shelf life.
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Old 22nd January 2012, 04:30 AM   #524
alexberg is offline alexberg
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No chemistry, just common sense, knowing the fact that the coating not just dries but polymerizes (which is stated AND is readable in TDS). It happens when air and, consequently, moisture gets in:
QUOTE Wipe sprayer tip prior to storage to prevent coating from hardening in the tip’s opening. END QUOTE
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Old 22nd January 2012, 07:01 AM   #525
chinsettawong is offline chinsettawong  Thailand
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I don't have any problem with 6300 at all, and that has been a long while since I put the coating on.

Wachara C.
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Old 22nd January 2012, 11:20 AM   #526
arend-jan is offline arend-jan  Netherlands
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@alex OK thanks for clearing that up.
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Old 23rd January 2012, 02:36 AM   #527
Atom666 is offline Atom666  Canada
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Old 23rd January 2012, 08:39 AM   #528
JonasKarud is offline JonasKarud  Sweden
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Talking about coatings, I was a little surprised to see that Martin Logan still make use of the old "graphite slurry"!!

Look here, at step 4:

Making of a MartinLogan Electrostatic Speaker Panel | Caster Communications
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Old 23rd January 2012, 11:46 AM   #529
alexberg is offline alexberg
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Quote:
Originally Posted by JonasKarud View Post
Talking about coatings, I was a little surprised to see that Martin Logan still make use of the old "graphite slurry"!!

Look here, at step 4:

Making of a MartinLogan Electrostatic Speaker Panel | Caster Communications
Yea, but slurry is used, as I understood it, just to fill breaks in coating which is initially magnetron (most likely) deposited in vacuum. It should be carbon based by ML description. They do not disclose what it is exactly.
QUOTE to fill micro-fractures which occur naturally during the stretching process END QUOTE
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Old 23rd January 2012, 01:56 PM   #530
chinsettawong is offline chinsettawong  Thailand
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Hi JonasKarud,

Wow! Thanks for the link. I wonder why ML doesn't even bother to put a charge ring in its ESL.

Wachara C.
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