Project:PCB Making/Cupric chloride etchant: Difference between revisions

Project:PCB Making/Cupric chloride etchant (view source)

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Artag

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 I've set up a bath using this system and made the first pcb. Results are quite encouraging - I kept it at the low end of possible concentrations and ran it it 35 C (the tank will go to about 50), so fumes are acceptably low. It did a decent etch in 15 minutes. I used liquid developer from Mega, which takes about 1 minute.--[[User:Artag|Artag]] 16:49, 6 September 2010 (UTC)
-There is some HCl in the space (I think it may have been donated by Aden) and some NaOH for titration.  I have ordered 500g of Copper II Oxide (CuO) so whe should have most of what we need to get running pretty quickly when the donated tank arrives.  I'll try and get a syringe for the titration from Boots, but I'm not sure how friendly they're likely to be...
+* The hackspace tank has now been changed to this system. It was set up using HCl and copper wire, left to disolve for several days. More HCl was added to reach the parameters described in the texts above. It's working well and we have found it occasionbally convenient to accelerate the rejuvenation by adding a litle peroxide.
 * I have plenty of syringes, bought from [http://stores.ebay.co.uk/Acuflow?_rdc=1 acuflow]. These work very well for measuring, I will bring some in. Although a flask is best for watching the titration, I have used a glass [http://cgi.ebay.co.uk/GRADUATED-SIMAX-MEASURING-CYLINDER-100ml-/200515125077 measuring cylinder] and found it convenient for both measuring the water (diluting the etchant) and mixing in the NaOh. They can be obtained from wine / beer making shops. - artag