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Steve M. Taylor
11/01/05 03:13
Read: 767 times
State College

Msg Score: +1
 +1 Informative
#103214 - Bubble tank
Responding to: Charles Bannister's previous message
Charles Bannister said:

Ans. I etch one side at a time.

Hi Charles,
The best way to etch (faster, does both sides) is either a spray etch, or a bubble etch - spray etching is harder to do, but gives incredible fast etch rates.

You can make a very very cheap bubble etching tank from a polythene container (long narrow tanks are best), a piece of plastic tube and an aquarium pump, or even, in extremis an inner tube filled with air. Drill or pierce SMALL holes in the tube for a length comparable to the length of your tank. Weight the tube, so it sinks even when full of air. Place the PCB VERTICALLY in the tank and fill with etchant- we did it with a rail across the tank and some clothes pegs to hold the pcb off the rail.

Keep the etchant warm, with an aquarium immersion heater, or your natural ambient ! and blow. With decent etchant, you can strip a panel is less than 5 minutes.


List of 25 messages in thread
Toner Transfer PCB's      Rob Vassar      09/26/05 14:03      
   Toner Transfer      Farshid Jafari Harandi      09/26/05 14:20      
      Don't forget      Jon Ledbetter      09/26/05 14:36      
         I used acetone      Rob Vassar      09/26/05 15:05      
         clean copper side      Farshid Jafari Harandi      09/26/05 20:18      
   File Edges of PCB top and bottom.      Charles Bannister      09/27/05 00:33      
      Type of paper used      Ashwin Nayak      10/07/05 10:53      
         PNP BLUE Type thermal paper.      Charles Bannister      10/07/05 12:28      
      Amazing      Vignesh Prasad      10/11/05 08:41      
         Double sided...      Robert Perez      10/11/05 14:34      
         Alignment of Top and Bottom PCB Layers      Charles Bannister      10/11/05 14:35      
            Double sided etching      Vignesh Prasad      10/12/05 11:25      
               Double sided post !      Vignesh Prasad      10/31/05 08:32      
               Q&A double sided etching      Charles Bannister      10/31/05 19:02      
                  Bubble tank        Steve M. Taylor      11/01/05 03:13      
                     Making one with these guidelines      Abhishek Singh      11/01/05 07:43      
                     addendum      Steve M. Taylor      11/01/05 10:16      
                     Like these...      Jon Ledbetter      11/01/05 10:26      
                     Something like this?      Vignesh Prasad      11/01/05 21:46      
                        Yes      Steve M. Taylor      11/02/05 09:41      
                  New methods      Vignesh Prasad      11/01/05 21:49      
         Art Paper      Ashwin Nayak      10/30/05 11:49      
            Blue sheet Vs Photographic paper      Charles Bannister      10/30/05 14:52      
            Timing and Tinning      Vignesh Prasad      10/31/05 08:43      
               Tin your self      Abhishek Singh      10/31/05 21:03      

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