Electronics Forum | Thu Jun 08 11:05:27 EDT 2017 | davef
By the way that you stated your question, I assume that you want to do something different with the carbon inked pads. If that's incorrect, instead of removing your carbon ink, considering printing an insulating layer over the ink.
Electronics Forum | Tue Jun 06 15:42:36 EDT 2017 | stratsmyboy
Hi im new to the forum. We have product where we have applied a carbon finish. I want to remove the carbon to reapply but cant seem to find a solution. Its baked onto solder mask. Any ideas? I was hoping something non abrasive to save scratching the
Electronics Forum | Tue Jun 06 21:15:23 EDT 2017 | davef
I'd be surprised if you find a non-destructive method of removing carbon ink. Your best bet is following the recommendations of your ink supplier.
Electronics Forum | Thu Jun 08 02:37:55 EDT 2017 | robertpeng
Carbon ins has very strong resistance to acid and alkali, not easy to remove, maybe return your boards to PCB supplier? they may have solution. Robert Peng- SysPCB
Electronics Forum | Tue Apr 06 12:13:46 EDT 2021 | luca
Hello, does anyone know if there is an IPC standard for carbon ink? we use for keypads instead ENIG, we found batchs of PCB with 2-3ohm, 20ohm, until 300ohm( resistance of contact surface) by the same PCB supplier!
Electronics Forum | Mon Mar 19 22:07:05 EST 2001 | davef
Your carbon filters are getting gummed-up by the smoke component of the fumes. [Your carbon filter is intended to remove the vapor portion of the fumes.] You need a cheap bag filter in front of the carbon filter that you can sacrifice. These fumes
Electronics Forum | Wed May 03 15:56:25 EDT 2006 | Board House
Hi Patrick, Thank you for the info, We like to push ENIG, for us being the ENIG line is in house it is cheaper to use than the carbon, plus shelf life of the Carbon is an issue in Storage. Pre-application. Thanks again, Mike
Electronics Forum | Wed May 03 22:14:29 EDT 2006 | davef
We think well done carbon ink and well done ENIG are equally reliable [maybe 1M operations]. If the gold is pourous [not all that an uncommon], ENIG is far less reliable than carbon ink.
Electronics Forum | Thu Mar 05 22:13:16 EST 2009 | davef
There is no IPC specification on carbon ink. Consider talking to your ink supplier to develop the proper quality definition that you require. Most suppliers have a good understanding of their product performance, for instance: http://www.coates.com/
Electronics Forum | Fri Dec 14 10:59:23 EST 2001 | Donald C. Burr
We are considering converting from a water wash wave solder porcess of carbon ink touch pad buttons to a no-clean process. Since the carbon ink buttons are exposed to the molten solder, we are concerned about the residue that is left behind from the
