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Date:	Wed, 2 Apr 2014 08:07:24 -0400
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Subject:	Re: [geda-user] printing from PCB
From:	Jason White <whitewaterssoftwareinfo AT gmail DOT com>
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Building your own boards, ay?

I know this isn't directly related to your question but I always exported a
1000 dpi monochrome PNG file for each layer and loaded it into GIMP or
another photo manipulation program. From there I could panelize my design
(tile it), add descriptive headers such as "THIS SIDE UP" and print it with
a supposed .001" accuracy. At 1000dip the resolution of the image in pixels
correlated directly to how many thousands of an inch wide it was supposed
to be, simplifying the task of recognizing how big or small a design really
was.

One thing I found was that the large commercial printers such as the ones
Staples or OfficMax typically have, print *far* superior masks
(transparency slides) than anything I could achieve at home with a consumer
laser printer. If you are doing photo-lithography (the photo transfer
method) I would strongly recommend getting a pdf of the mask printed off by
them for a buck or two. Typically home printed transparencies have to be
doubled up for additional opacity, whereas theirs did not.

I found this to be a real advantage because it's very difficult to align
multiple sheets, the plastic when its printed on seems to warp a little bit
as its heated by the printer, causing the same image printed twice even on
the same sheet not to be exactly the same dimensions. Also I typically
under-exposed my boards in fear of small (8-10mil) traces would get washed
out. The amount of time in the developer goes down significantly if the
board is exposed a bit longer than the absolute minimum needed to get the
pattern in the photo resist.

Just my 2 cents.

Jason White.


On Wed, Apr 2, 2014 at 6:21 AM, Richard Bown <richard AT g8jvm DOT com> wrote:

> Hi,
> On the 8th attempt I now have a board ready to print on to a
> transparency.
>
> When printing is there any way of NOT printing the header sheet with
> the list of whats there ?
> I found I can deselect the top of the board OK, just want to print the
> bottom only.
>
> It would be nice if some how I could add to the printing menu the size
> 6X4", or a wee bit bigger, as I'm using a printer with a tray for photo
> paper as well.
> So I could pre-cut the film to 6x4" and load it from the top tray ,
>
> I see A, B, C & D sizes but not sure what they are, and I'm not sure on
> US paper sizes, sri.
> The paper guide on the printer tray will open out to 4.5" , so a little
> tolerance of size.
>
> many thanks
>
> --
> --
> Best wishes /73
> Richard Bown
> Email : richard AT g8jvm DOT com
> HTTP  :  http://www.g8jvm.com
> nil carborundum a illegitemis
>
> ##################################################################################
> Ham Call G8JVM . OS Linux Mint 16 x86_64 on a Dell Inspiron N5030 laptop
> Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W
> QRV VHF 6mtrs 200W, 4 mtrs 150W, 2mtrs 400W, 70cms 200W
> Microwave 23 cms 140W, 13 cms 100W, 6 cms 0W & 3cms 5W
>
> ##################################################################################
>
>


-- 
Jason White

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<div dir=3D"ltr"><div><div><div><div>Building your own boards, ay?<br></div=
><div><br>I know this isn&#39;t directly related to your question but I alw=
ays exported a 1000 dpi monochrome PNG file for each layer and loaded it in=
to GIMP or another photo manipulation program. From there I could panelize =
my design (tile it), add descriptive headers such as &quot;THIS SIDE UP&quo=
t; and print it with a supposed .001&quot; accuracy. At 1000dip the resolut=
ion of the image in pixels correlated directly to how many thousands of an =
inch wide it was supposed to be, simplifying the task of recognizing how bi=
g or small a design really was.<br>
<br></div>One thing I found was that the large commercial printers such as =
the ones Staples or OfficMax typically have, print *far* superior masks (tr=
ansparency slides) than anything I could achieve at home with a consumer la=
ser printer. If you are doing photo-lithography (the photo transfer method)=
 I would strongly recommend getting a pdf of the mask printed off by them f=
or a buck or two. Typically home printed transparencies have to be doubled =
up for additional opacity, whereas theirs did not.<br>
<br></div>I found this to be a real advantage because it&#39;s very difficu=
lt to align multiple sheets, the plastic when its printed on seems to warp =
a little bit as its heated by the printer, causing the same image printed t=
wice even on the same sheet not to be exactly the same dimensions. Also I t=
ypically under-exposed my boards in fear of small (8-10mil) traces would ge=
t washed out. The amount of time in the developer goes down significantly i=
f the board is exposed a bit longer than the absolute minimum needed to get=
 the pattern in the photo resist.<br>
<br></div>Just my 2 cents.<br><br></div>Jason White.<br></div><div class=3D=
"gmail_extra"><br><br><div class=3D"gmail_quote">On Wed, Apr 2, 2014 at 6:2=
1 AM, Richard Bown <span dir=3D"ltr">&lt;<a href=3D"mailto:richard AT g8jvm DOT co=
m" target=3D"_blank">richard AT g8jvm DOT com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Hi,<br>
On the 8th attempt I now have a board ready to print on to a<br>
transparency.<br>
<br>
When printing is there any way of NOT printing the header sheet with<br>
the list of whats there ?<br>
I found I can deselect the top of the board OK, just want to print the<br>
bottom only.<br>
<br>
It would be nice if some how I could add to the printing menu the size<br>
6X4&quot;, or a wee bit bigger, as I&#39;m using a printer with a tray for =
photo<br>
paper as well.<br>
So I could pre-cut the film to 6x4&quot; and load it from the top tray ,<br=
>
<br>
I see A, B, C &amp; D sizes but not sure what they are, and I&#39;m not sur=
e on<br>
US paper sizes, sri.<br>
The paper guide on the printer tray will open out to 4.5&quot; , so a littl=
e<br>
tolerance of size.<br>
<br>
many thanks<br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
--<br>
--<br>
Best wishes /73<br>
Richard Bown<br>
Email : <a href=3D"mailto:richard AT g8jvm DOT com">richard AT g8jvm DOT com</a><br>
HTTP =A0: =A0<a href=3D"http://www.g8jvm.com" target=3D"_blank">http://www.=
g8jvm.com</a><br>
nil carborundum a illegitemis<br>
###########################################################################=
#######<br>
Ham Call G8JVM . OS Linux Mint 16 x86_64 on a Dell Inspiron N5030 laptop<br=
>
Maidenhead QRA: IO82SP38, LAT. 52 39.720&#39; N LONG. 2 28.171 W<br>
QRV VHF 6mtrs 200W, 4 mtrs 150W, 2mtrs 400W, 70cms 200W<br>
Microwave 23 cms 140W, 13 cms 100W, 6 cms 0W &amp; 3cms 5W<br>
###########################################################################=
#######<br>
<br>
</font></span></blockquote></div><br><br clear=3D"all"><br>-- <br>Jason Whi=
te
</div>

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