Homebrew PCBs

I have had great success with this process and making printed circuit 
"silkscreens" (also very easy) but instead of transparency paper (too 
expensive) I used a very light weight "onion skin" type writing paper (about 
$2.00 for 50 sheets) that took the ink very well but still let the UV from a 
sunlamp through. I placed this over very fine printing silk set in a frame 
that I had coated with silk screen emulsion (artshop) for about 9 minutes. 
After the screen was made I printed the image to circuit boards using a 
squeegee and black acrylic ink. Let it dry and etched it. washed the acrylic 
ink over with a scrubbee. I made a ton of boards and those that printed 
badly, I just washed the acrylic ink off and printed again. Good for all but 
very fine traces (like 5 mil). This method is cheaper than transfer paper or 
anything else (IMHO)

Bob


>From: "elsokwak" <elsokwak@...>
>Reply-To: Homebrew_PCBs@yahoogroups.com
>To: Homebrew_PCBs@yahoogroups.com
>Subject: [Homebrew_PCBs] Re: Boardmaker  Output to HP DeskJet 920 or 960 
>Inkjetprinters
>Date: Fri, 07 Jun 2002 13:46:24 -0000
>
>Derek,
>It works!.
>I just made a very neat looking PCB with the HP DeskJet 960c!
>First I had to overcome HP's Commercial trick; I had to install the
>colorcartridge before the machine was willing to print in black and
>white.
>I am using transparencies made by Canon for Color BJ printer(CF-101)
>after almost getting
>a heardattack reading the price for the HP trannies ($ 45 for 50)
>There are thousends of microscopic little pinholes on the
>transparency but that proved not to be a problem. I am using Bunguard
>FR4 PCB material. The PCB's are exposed with UV light using contact
>printing method.
>Even with the slow output from the 286 computer I did not get white
>stripes as was always the problem with the old Olivetti.
>Thanks again!
>ELSO
>
>
>
>--- In Homebrew_PCBs@y..., "High Tech" <hightechsystems@a...> wrote:
> >
> > Elso,
> > I am running my dos program on windows 98se right now but it did
>work
> > on a dos only computer too.
> > Derek
> >
> >
> > Hi Derek,
> > Thanks for the reply.
> > I don't understand the last sentence of your post stating that all
> > DOS programs are sending the printjob through Windows.
> > Boardmaker does not work under Windows; Windows should not even be
> > detected. Boardmaker is a pure DOS program and works on a PC
>without
> > Windows on it. The printerdriver is contained in the program and
>has
> > HP PCL3 language.
> > But if your old program can print to a HP970 I am confident it will
> > work with the HP960 DeskJet too.
> > ELSO
> >
> > --
> > >   All dos programs still send the print job through windows so
>the
> > HP
> > > program must be converting the file before it goes to the
> > >   printer.
> > >
> > >   Derek
> > >
> > >     I used the laserjetprinter output of the program. I
>understand
> > this
> > >     in in HP PCL3 language to the printer. The Boardmaker program
> > >     supports printers like HP LaserjetII.
> > >     The new HP Inkjet printers use HP PCL 3 IMPROVED language. So
>my
> > >     question is: is this new  language backwards compatible? Can
>I
> > use a
> > >     HP Deskjet 920 or 960 with my old Boardmaker PCB design
> > software?
> > >     The program runs under DOS; Windows should NOT be detected.
> > >     Any help greatly appreciated.
> > >     ELSO.
> > >
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
>




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