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#1
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Tip of a conductive pen is dry
The pen could no longer draw. Anyway to fix it?
Chemotronics: CircuitWorks Conductive Pen - Micro Tip (CW2200MTP) -- @~@ Might, Courage, Vision, SINCERITY. / v \ Simplicity is Beauty! May the Force and Farce be with you! /( _ )\ (Xubuntu 8.04.1) Linux 2.6.24-16-generic ^ ^ 19:13:02 up 24 min 3 users load average: 7.12 8.18 7.03 ???! ???! ???! ???! ???! ???! ????? (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
#2
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Tip of a conductive pen is dry
Man-wai Chang ToDie (33.6k) wrote:
The pen could no longer draw. Anyway to fix it? Chemotronics: CircuitWorks Conductive Pen - Micro Tip (CW2200MTP) The MSDS is here. http://www.newark.com/datasheets/CHEMTRONICS/4001.pdf Chemical Name CAS No. Wt. % Range Silver 440-22-4 35.0-65.0 Propylene Glycol Methyl Ether Acetate 108-65-6 2.0-20.0 Ethylene Glycol Monobutyl Ether Acetate 112-07-2 2.0-20.0 n-Butyl Acetate 123-86-4 5.0-35.0 Acrylic Resin mixture 15.0-40.0 The n-Butyl Acetate appears to be a solvent, for whatever that is worth. If the Acrylic Resin has hardened, then adding a solvent probably wouldn't help. http://en.wikipedia.org/wiki/Butyl_acetate The datasheet from the manufacturer suggests adding the solvent. The pen has a shelf life rating of 18 months. http://www.chemtronics.com/products/.../Cw2200tds.pdf Their recommended solvent for removing the tracks drawn with the pen, is "Electo-Wash PX", another blend of solvents. http://www.chemtronics.com/products/...DS/1210TDS.pdf http://www.newark.com/datasheets/CHEMTRONICS/0213L.pdf Since you're supposed to squeeze the pen, to force the product through the tip, cutting a hole in the end of the pen to add solvent, will degrade the ability to use the pen. Paul |
#3
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Tip of a conductive pen is dry
The n-Butyl Acetate appears to be a solvent, for whatever
that is worth. If the Acrylic Resin has hardened, then adding a solvent probably wouldn't help. .... The datasheet from the manufacturer suggests adding the solvent. The pen has a shelf life rating of 18 months. ... Since you're supposed to squeeze the pen, to force the product through the tip, cutting a hole in the end of the pen to add solvent, will degrade the ability to use the pen. Does this mean: Sorry, you have to throw it away and get a new one? -- @~@ Might, Courage, Vision, SINCERITY. / v \ Simplicity is Beauty! May the Force and Farce be with you! /( _ )\ (Xubuntu 8.04.1) Linux 2.6.24-16-generic ^ ^ 19:13:02 up 24 min 3 users load average: 7.12 8.18 7.03 ¤£*ɶU! ¤£¶BÄF! ¤£´©¥æ! ¤£¥´¥æ! ¤£¥´§T! ¤£¦Û±þ! ½Ð¦Ò¼{ºî´© (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
#4
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Tip of a conductive pen is dry
Man-wai Chang ToDie (33.6k) wrote:
The n-Butyl Acetate appears to be a solvent, for whatever that is worth. If the Acrylic Resin has hardened, then adding a solvent probably wouldn't help. .... The datasheet from the manufacturer suggests adding the solvent. The pen has a shelf life rating of 18 months. ... Since you're supposed to squeeze the pen, to force the product through the tip, cutting a hole in the end of the pen to add solvent, will degrade the ability to use the pen. Does this mean: Sorry, you have to throw it away and get a new one? A solvent is a liquid that dissolves something. As you noted in the chemistry information I dug up, the chemistry of your pen is a little complicated. The pen has a shelf life of 18 months. That means the manufacturer thinks it will "dry up" after 18 months with the cap tightly sealed on it. You could open the opposite end of the pen, and add n-Butyl Acetate. The n-Butyl Acetate would match the current small quantity of solvent present inside the pen, and loosen the consistency of the product near the tip. That is, if the resin in the pen hasn't become hard. The resin may be designed to polymerize (resin molecules chain themselves together), in which case that would be a relatively permanent chemical reaction (something which a solvent may not help). The short answer is (drum roll): "Throw it away" Can you buy n-Butyl Acetate solvent at the store ? This is an example of n-Butyl Acetate, and it has a few safety cautions. If you were going to work with this material, you'd do it outside. The liquid is flammable, and the vapor could be ignited by a spark. Treat it with respect, like it was gasoline. http://www.safety-kleen.com/MSDS/82385rev12-13-05.pdf Just out of curiosity, did you follow the instructions on the package ? The pen is supposed to be agitated (shaken) before usage, as the materials inside don't mix well. It could be that the silver has collect near the tip for example. Maybe with a little shaking, it will start to flow again. Paul |
#5
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Tip of a conductive pen is dry
Can you buy n-Butyl Acetate solvent at the store ?
This is an example of n-Butyl Acetate, and it has a few safety cautions. If you were going to work with this material, you'd do it outside. The liquid is flammable, and the vapor could be ignited by a spark. Treat it with respect, like it was gasoline. Um... n-Butyl Acetate... http://www.safety-kleen.com/MSDS/82385rev12-13-05.pdf Just out of curiosity, did you follow the instructions on the package ? The pen is supposed to be agitated (shaken) before usage, as the materials inside don't mix well. It could be that the silver has collect near the tip for example. Maybe with a little shaking, it will start to flow again. The shelf life thing... I didn't check it when I bought it. And I have not used it for over a year.... IN case the pen is totally dried, not even the proper solvent could make it work again, right? -- @~@ Might, Courage, Vision, SINCERITY. / v \ Simplicity is Beauty! May the Force and Farce be with you! /( _ )\ (Xubuntu 8.04.1) Linux 2.6.24-16-generic ^ ^ 19:13:02 up 24 min 3 users load average: 7.12 8.18 7.03 ¤£*ɶU! ¤£¶BÄF! ¤£´©¥æ! ¤£¥´¥æ! ¤£¥´§T! ¤£¦Û±þ! ½Ð¦Ò¼{ºî´© (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
#6
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Tip of a conductive pen is dry
Man-wai Chang ToDie (33.6k) wrote:
Can you buy n-Butyl Acetate solvent at the store ? This is an example of n-Butyl Acetate, and it has a few safety cautions. If you were going to work with this material, you'd do it outside. The liquid is flammable, and the vapor could be ignited by a spark. Treat it with respect, like it was gasoline. Um... n-Butyl Acetate... http://www.safety-kleen.com/MSDS/82385rev12-13-05.pdf Just out of curiosity, did you follow the instructions on the package ? The pen is supposed to be agitated (shaken) before usage, as the materials inside don't mix well. It could be that the silver has collect near the tip for example. Maybe with a little shaking, it will start to flow again. The shelf life thing... I didn't check it when I bought it. And I have not used it for over a year.... IN case the pen is totally dried, not even the proper solvent could make it work again, right? Well, it does contain "resin", and I don't know exactly how that resin works. You would think something would initiate polymerization, and maybe it is set up to do that on contact with air. http://en.wikipedia.org/wiki/Acrylic_resin I would think a polymerization reaction would generally be non-reversible. The material may be chemically attacked (i.e. burning it, would be a form of attack), but turning it back into the original liquid form isn't too likely. What are you using the circuit pen for, anyway ? It might be good for repairing a broken trace on a printed circuit board, but you can also solder a strand of wire to the surface of a broken track. So a soldering repair may also be a workable alternative. Another solution similar to your circuit pen, is a rear window defogger repair kit. I have a kit here, which cost about $10, and it has similar chemicals in it (including suspended silver particles). To use the kit, you place a stencil (tape) on the object to be repaired, to prevent the fluid from flowing where you don't want it. Some people use stuff like this, for controlling logic signals (like for overclocking a motherboard). http://www.permatex.com/documents/td...tive/15067.pdf http://www.permatex.com/documents/ms...lish/15067.pdf The quantity of chemicals included in the kit, is tiny, and you won't get many repairs from it. It comes in a tiny glass vial, with a brush applicator. It uses a different material for the solid part, poly methyl methacrylate. http://en.wikipedia.org/wiki/Poly_methyl_methacrylate Paul |
#7
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Tip of a conductive pen is dry
What are you using the circuit pen for, anyway ?
I bought it for shorting 2 pins of the old Celeron 1.1G in order to overclock it. Let me digest your advices first. thanks. -- @~@ Might, Courage, Vision, SINCERITY. / v \ Simplicity is Beauty! May the Force and Farce be with you! /( _ )\ (Xubuntu 8.04.1) Linux 2.6.28.1 ^ ^ 16:19:01 up 1:10 0 users load average: 1.00 1.00 1.00 ¤£*ɶU! ¤£¶BÄF! ¤£´©¥æ! ¤£¥´¥æ! ¤£¥´§T! ¤£¦Û±þ! ½Ð¦Ò¼{ºî´© (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
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