Does anyone use sodium persulfate as etchant? I'm makeing my first pcb using toner transfer from kodak-paper. But the etchant doesn't work very well. I use...
... When I've used ammonium persulpate it had to be warm to work properly. Leon -- Leon Heller, G1HSM Tel: +44 1424 423947 Email: aqzf13 at dsl dot pipex dot...
... 0.8 dl would be 0.8 deciliters = 0.08 liters = 80 milliliters Is that correct ? Normal makeup concentration of ammonium persulfate etchant is 100 to 200 ...
Sodium persulfate is a rather slow etchant, but it produces a very clean surface. We used to use it as the basis for a chemical clean line prior to laminating...
Any help or tips on etching double sided boards? I want to etch a double sided board, nothing to complicated. I have etched before using laser transfer method...
I suspect that the water you used was not hot enough . I had the same problem recently - I tried hot water out of the tap but it would not etch. so I then used...
Monthly Reminder, please read: Subject lines: Remember to change the subject line if you are straying from the original thread. Please change the subject line...
Homebrew_PCBs@yahoogr...
Nov 2, 2004 4:45 am
7376
By lining up, I assume you mean aligning the two pieces of paper that have the transfer patterns printed on them. I use 24 lb paper for printing the toner on...
http://www.epson.co.jp/e/newsroom/news_2004_11_01.htm This prints conductors and insulating layers in subsequent passes. Time will tell if this is viable and...
That is very interesting although it looks like a technology announcement with no product mentioned. I suspect that it will be a while before this becomes...
Somebody finally did it. It sure took long enough. I suggested this approach over 15 years ago when I was in the duPont electronics department. Of course I...
Epson leads the way in inkjet printers. I think they are the best and most dependible I have ever used (although I have only used a few). They are also the...
Hi group, A friend of mine stumbled upon a great method for PCB / copper clad cleaning before doing toner transfer. Nevr-Dull (www.nevr-dull.com) "magic...
Manuel Bessler
pic@...
Nov 3, 2004 5:25 pm
7382
I Just Installed that program and It looks Great. But I get the Occassional LOCKUP when I move a Pad out of Area. Do you get that problem? I also still need to...
... Please keep discussion on the list. It's kind of arrogant to expect others to help just you and no one else, if you can't be bothered to come back to the...
Hi Chaps. As requested replying via the list. No I haven't had any hang-ups at all, most of my problems came from an inability to speak French. However it is...
Sorry forgot to mention you can make up your own components for the library, Just do it the same as you would a normal PCB layout (pads, tracks and artwork) .....
OK, I've uploaded two pictures to my website showing the results of Nevr-Dull as a PCB cleaning aid: http://cockpit.varxec.net/tmp/img2688.jpg ...
Manuel Bessler
pic@...
Nov 4, 2004 2:58 am
7390
... Did you clean the board with solvent after nevr dull? It is said it leaves a coating. I am surprised the toner sticks to it, i expect it to be similar to ...
On Thu, 04 Nov 2004 06:57:43 +0100 ... I don't think we cleaned it with solvent afterwards, AFAIR we just rubbed the "film" of that stuff off with Kleenex...
Manuel Bessler
pic@...
Nov 4, 2004 12:22 pm
7392
it is possible that the film this stuff leaves is some how binding to the toner. How does it do on large areas of copper? I'm always looking for ways to...
On Thu, 04 Nov 2004 19:40:31 -0000 ... It does very well on large copper areas. That particular board had only a few traces, and the rest was all copper pour....
Manuel Bessler
pic@...
Nov 4, 2004 8:13 pm
7394
Hi Sometimes i observe the track to get thinner just where it attaches to the pad, maybe the last 2mm, gradually. Not often, but sometimes. It seems to be...
... same thinking here. reduce pinholes: use thinner paper (and no carrier sheet) makes the printer apply more toner. second run through the laminator tends to...
After much thinking for an old brain, I remember that we used something like this (sometimes instead of Brasso) to clean the brass for our uniforms. I guess...
This may be an anti tarnish compound. Many anti tarnish compounds contain amines that form very strong bonds to copper and often act as a base for adhering...
In article <418AA267.80908@...>, ... Brasso, like all common metal cleaning products, contains a polish which will leave a film on the copper. Whether...
