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Re: [Homebrew_PCBs] Etching tank, build or buy?

2007-11-23 by Dave

Philip Pemberton wrote:
 >
 > Dave wrote:
 > > Is there some simple but professional plans to build an etchant tank? I
 > > mean with heater and agitation, not just a jar and manual labor:)
 >
 > 1) Buy one of those Tupperware-style cereal containers - the big tall
 > two-or-three litre things.
 > 2) Glue a pair of 4" x 1" chunks of plastic (Perspex, Plexiglass, 
whatever's
 > lying around) onto the bottom on either side -- one 4x1 on the left, 
one on
 > the right. This should help stabilise the tank.
 > 3) Buy an air pump, bubbler hose and fish tank heater from your local 
pet shop.
 > 4) Glue the hose into the bottom of the tank - use something fairly 
inert and
 > heat resistant. Araldite works a treat, 5-minute epoxy is slightly better
 > (slightly stronger and more time to work with it before it sets).
 > 5) Glue the heater support clip onto one side of the tank, then mount 
the heater.
 > 6) Fill the tank about three-quarters full of water. Fire up the 
bubbler and
 > the heater. Leave it like this for a while to get any glue residue 
out. Drain
 > and repeat.
 > 7) Fill the tank about three-quarters full of etchant. Fire up the heater
 > about 20 minutes before you need the tank, and turn on the bubbler 
once the
 > etchant is warm.
 > 8) Drop your board in the tank. Wait for it to etch, then pluck it out. I
 > usually drill a hole in the corner of the board and thread some 
insulated wire
 > through it, then lift the board out by the wire.
 >
 > Probably not the best way to do it, but it works for me!
 >
 > I've got some photos of the thing if anyone's interested.
 >
 > --
 > Phil. | (\_/) This is Bunny. Copy and paste Bunny
 > ygroups@... | (='.'=) into your signature to help him gain
 > http://www.philpem.me.uk/ | (")_(") world domination.
 > 


Phil, I would like to see a picture of this contraption :)
Thanks,
Dave

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