RE: [Homebrew_PCBs] Re: Photoresist
2012-01-01 by Jeff Heiss
Hi Baxter, I read a message from a few months ago on the UV Pen discussion that you were experimenting with a UV LED and a microscope objective to focus the
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Re: Best Printer for photo process ?
2011-12-31 by marc
HI Medical film printer i see was limited to 325DPI it use kind of thermal film so good process but lack of resolution .. I just but a new xerox solid-ink
Re: Best Printer for photo process ?
2011-12-31 by clausundercover
Has anyone tried making negatives with medical imaging printers? Those that print out x-rays. I was watching some kodak dryview on e-bay and they are around
Re: Best Printer for photo process ?
2011-12-30 by marc
Hi Robby buy my lpkf in 2004 (milling,plating,multilayer press) and yes it very expensive cost price of a nice car ;-) i find quickly that for be reliable it
Re: Explosive Byproduct: what are the risks with muriatic acid?
2011-12-30 by psykhon@yahoo.com
By guessing your level of knowledge on the matter, I would recommend that you shoul be more carefull with the chlorine gas that may be released from the
Re: [Homebrew_PCBs] Explosive Byproduct: what are the risks with muriatic acid?
2011-12-30 by Piers Goodhew
For me, NI3 to me is the very embodiment of the dawn of the internet: in the late 80 s a friend of ours said he was over BBSes and wanted to get on this new
Re: [Homebrew_PCBs] Explosive Byproduct: what are the risks with muriatic acid?
2011-12-30 by David Griffith
... I remember a story in which someone dipped the ends of a pair of pencils in the stuff. The pencils were owned by a student who was well-known for playing
Re: [Homebrew_PCBs] Explosive Byproduct: what are the risks with muriatic acid?
2011-12-30 by Dylan Smith
... We did that at school, putting it around things like door frames so when someone closed a door there would be a very loud bang. It all sort of backfired
Re: Best Printer for photo process ?
2011-12-30 by Robert
LPKF is some good stuff I read about, kinda pricey for me though, about as close to the machine/router as I want to spend (time and $) is a RepRap for plastic
RE: [Homebrew_PCBs] Explosive Byproduct: what are the risks with muriatic acid?
2011-12-30 by Ronald Cody
Hi, You are safe, it takes a little more than just Muriatic Acid and hydrogen peroxide. It s also a bit more complex than simply mixing it all together. Ron
RE: [Homebrew_PCBs] Re: Best Printer for photo process ?
2011-12-30 by Boman33
Marc, It sounds like we have been traveling down the same roads. I also used to use Diazo for the final artwork but like you, I am hoping for direct printing
Re: Best Printer for photo process ?
2011-12-30 by marc
HI Robby that look really nice think that sublimation printer may have good result even if i have some budget for have just selling all my lpkf equipment not
Photo negative printer choice
2011-12-30 by Terry Mickelson
I had a look at a Xerox solid ink (wax) printer and the printout looks opaque without any need for touchups. My inkjet is a piece of crap and our Laser printer
Re: Metal Core PC boards
2011-12-30 by marc
Hi yes PCB was etched and via made before lamination then after lamination solder mask and silk was made it not good idea to put aluminium on etch thank ;-)
Re: Best Printer for photo process ?
2011-12-30 by marc
Hi Bertho and all for now my Dell 3010cn have good resolution on mg chemical paper but on bright lamp dark area look Gray but uniform i will try a epson NX400
Re: [Homebrew_PCBs] Explosive Byproduct: what are the risks with muriatic acid?
2011-12-29 by Leon Heller
When I was about 12 I made some nitrogen tri-iodide, another very unstable and powerful explosive, and left it to dry on a piece of filter paper. The next
Re: [Homebrew_PCBs] Explosive Byproduct: what are the risks with muriatic acid?
2011-12-29 by toddroberts2001@aol.com
Your friendly neighborhood terrorist calls Acetone Peroxide Mother of Satan because it can blow up in their faces! Probably nothing to worry about with the
Re: [Homebrew_PCBs] Explosive Byproduct: what are the risks with muriatic acid?
2011-12-29 by Michael Zappe
I wouldn t think you d have much to worry about. If you made anything you would have heard it popping by now, especially while soldering. :-) The quantities
Re: [Homebrew_PCBs] Explosive Byproduct: what are the risks with muriatic acid?
2011-12-29 by Leon Heller
... There isn t any danger of an explosion, but the copper on your board might corrode because you didn t rinse it. Leon -- Leon Heller G1HSM
Explosive Byproduct: what are the risks with muriatic acid?
2011-12-29 by poofjunior
Hello, fellow PCB makers, I m new to the etching community, and most of my learning has come either from here or other places online. I ve made 3 successful
Re: Best Printer for photo process ?
2011-12-29 by Robert
I thought I saw a recommendation for the Ricoh 7000 somewhere... it s around $900 (new) a less expensive and not as fine dpi but Kyocera 1320 looks pretty
Re: [Homebrew_PCBs] Best Printer for photo process ?
2011-12-29 by michael tenore
Hi All! I once had access to Xerox 4125 laser printer that could lay down very dense traces for toner transfer when the print density was turned up.. You may
Re: [Homebrew_PCBs] Best Printer for photo process ?
2011-12-28 by Roland Harriston
Marc: One trick that I have found useful is to make two copies of your work on laser transparency material. Then place one copy over the other and make sure
RE: [Homebrew_PCBs] Best Printer for photo process ?
2011-12-28 by MIKE DURKIN
Has any one in the states tried this stuff? http://export.rsdelivers.com/product/rs/erprp200/aerosol-photoresist-solution-200ml/1989651.aspx It s positive
RE: [Homebrew_PCBs] Best Printer for photo process ?
2011-12-28 by Boman33
Hi Marc, I started testing different printers, inks, settings and media but ran out of time before finalizing the data. 3 printers * 5 media * varying ink
Re: [Homebrew_PCBs] Best Printer for photo process ?
2011-12-28 by Leon Heller
... I get excellent results with an HP 5940 and Mega Electronics Premium JetStar film. It s a cheap printer. Leon -- Leon Heller G1HSM
RE: [Homebrew_PCBs] Re: Metal Core PC boards
2011-12-28 by John Dammeyer
Thanks for the feedback. I take it that the thin FR4 is etched with the layout first before pressing. Otherwise the etchant would damage the core? John
Best Printer for photo process ?
2011-12-28 by marc
HI i made lot of search on the forum and not find clear answer about the best printer for make photo process Transparency ? lot of talk but for toner transfer
Re: Metal Core PC boards
2011-12-28 by marc
HI John is same as for multilayer board it use very thin FR-4 PCB (single or 2 side) then it hot laminate it to aluminium plate whit a Prepreg bethen pcb and
RE: [Homebrew_PCBs] Method for direct laser printing.
2011-12-28 by MIKE DURKIN
Have any more detail? Pictures? To: Homebrew_PCBs@yahoogroups.com From: michaelnoelme@gmail.com Date: Wed, 28 Dec 2011 00:10:43 +0000 Subject: [Homebrew_PCBs]
Re: Photoresist
2011-12-28 by Robert
and here... http://www.bungard.de/index.php?option=com_content&view=article&id=43&Itemid=60&lang=english nice video presentation Robert
Re: Photoresist
2011-12-28 by Robert
A photoplotter then would really bring things up a notch or so, For hobby I need small portable benchtop equipment, like the MEGA photoplotter...
Re: [Homebrew_PCBs] Re: Photoresist
2011-12-28 by Roland Harriston
Piers : Thanks for the additional information. Roland F. Harriston, P.D. ********************
Re: Photoresist
2011-12-28 by Robert
Yep, reminds me of Disney a few years ago... Steamboat Willy was past copyright duration and set to fall into the public domain , when Disney lobbied heavily
Re: Photoresist
2011-12-28 by Robert
Nice webpage Harvey! http://www.dragonworks.info/index.htm I liked the stepper motor control box and the oscilliscope rework! here s mine, a few good things
Re: [Homebrew_PCBs] Re: Photoresist
2011-12-28 by Piers Goodhew
A quick skim of the Wikipedia article (which is a little lacking in references, but has a few) reveals that CFCs have been found in the stratosphere since at
Method for direct laser printing.
2011-12-28 by michaelnoelme90
I did not get constant results with the gel backing printing method. I think the main reason was that humidity would change between when we had our etchent
Re: Photoresist
2011-12-27 by bebx2000
Hi Jeff, I got your email. I have pretty much put my experiments with DIY photoresists on the backburner. The patent that I originally cited has very precise
Re: [Homebrew_PCBs] Re: Photoresist
2011-12-27 by Roland Harriston
Robert: The much-repeated story about the banning of Dupont s Freon was that the patent was about to expire and that the material would become generic and
Re: [Homebrew_PCBs] Re: Photoresist
2011-12-27 by Harvey White
... KPR has xylene, possibly MEK and the like in it. Much nastier stuff to deal with than film resist, precoated boards, and sodium carbonate (?) developer.
Re: Photoresist
2011-12-27 by Robert
Very nice! Thanks for the info! You mention cost of copper clad... well that brings to mind another thought I had, and this may be off topic or not depending
Re: Photoresist
2011-12-27 by Robert
Interesting... I can recall reading something about Dupont having been reported as lobbying to ban hemp (not forming any opinions here, just saying I read
Re: [Homebrew_PCBs] Re: Photoresist
2011-12-27 by Roland Harriston
Kodak KPR and similar materials: If I recall correctly, the main problem with Kodak KPR and similar compounds was that the EPA (or an equivalent federal
Re: Photoresist
2011-12-27 by stan_katz
Since I don t remember seeing any detailed description by a pure hobbyist regarding diy photoresist method of producing pcbs, I think this thread is a good
Re: Photoresist
2011-12-27 by Robert
I found this link to a database of most commonly used photoresist: http://www.smartfabgroup.com/photoresists.php Robert
Re: Photoresist
2011-12-27 by Robert
a friend of mine has a screen printing shop for many years, what comes to mind is an emulsion for burning (exposing) screens. maybe that might work? or
Re: Photoresist
2011-12-27 by Robert
Thanks for all the input! So then avoid KPR even though it works well, is that because it s toxic? explosive? staining? if it works then maybe using proper
RE: [Homebrew_PCBs] Photoresist
2011-12-27 by Jeff Heiss
I have been researching and have found that making your own resist looks possible. The ingredients are polyvinyl alcohol (PVA) and ammonium dichromate. An
Re: [Homebrew_PCBs] Photoresist
2011-12-27 by Harvey White
... I never got that to work. ... DIY is one thing, professional gets nasty. ... also toner transfer, which can be surprisingly decent. ... Take your word,
RE: [Homebrew_PCBs] Photoresist
2011-12-26 by Nuno T.
POSITIV 20 negative photo resist doesn t work anymore. I believe the formula was changed a few years ago and now the method they recommend, the same has