http://www.zdnet.com.au/news/hardware/soa/Printer-s-gel-like-ink-works-on-everything/0,130061702,339289490,00.htm?omnRef=1337 Being UV cured, it could be a...
I've just noticed something that might be useful to other people using pre-coated boards. I was using up some rather old off-cuts while I waited for some new...
I am sorry , i tried to understand from the messages in the group how to do tin-plating for the copper of the board after etching but i didn't understand . any...
... Leon, At least with the brand I have they will still work years out of date. The issue is that they loose a lot of sensitivity and a little bit of...
The only advice I can give to you is... do not try that. If you are using the UV screen printable inks from Bungard you are using the pro stuff specially...
I like re-flow solder much better. I haven't tried my process with the lead-free solder yet, but I suspended the board in peanut oil and heated it. Then I...
Hi Folks I know that under-chip pads were mentioned recently, so I thought that I would pass on this link from the TimeNuts mailing list: Article: "How to...
Hi all Now i have been out of making Projects and PCB'S for some yrs now and have just got back into doing it, god what have i missed ?. I need to make about 3...
Quoth Howard at 2008-06-05 00:23... ... I have just fished the old lemonade bottle from under my bench in which I used to store partially used ammonium...
Quoth Howard at 2008-06-05 17:20... ... Sodium hydroxide. On an international forum, it can sometimes be easier to use standard chemical symbols rather than...
Quoth Howard at 2008-06-05 17:36... ... Hey, we all have - that's why we're here! -- Matthew Smith Smiffytech - Technology Consulting & Web Application...
... They could be a different brand/formula photoresist. could you explain what problems you had ? Is it negative or positive resist ? Was it a exposure,...
Quoth Adam Seychell at 2008-06-05 18:23... ... Adam - I'll fire the same question back at you - with which brand did you have this specific problem - Kinsten?...
... I think the resist was Macdermid brand, negative active. I got a roll of it several years ago and apply it myself. Because I develop the PCB almost...
... Matthew - it is kinsten stuff I had that I found to have lost a lot of sensitivity and a little bit of contrast when many year out of date. However...
Quoth Andrew at 2008-06-06 08:46... ... Thanks Andrew. The moral of this story is, therefore, to run a test strip on every batch of stock. Have a small strip...
I was thinking of buying a box of photoresist for myself, but won't have much need for two 500 foot x 12" wide roles. So I'm curious if there would be a market...
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