FWIW,
Recently I noticed that the toner in my laserjet printer is probably running
low, so the images are not as dark as they used to be a few years ago. I
took out the cartrige, gently tilted and shook it from side to side, cleaned
the roller, put it back, and printed a blank page (shaking disturbs the
toner so on the first page it sticks to places where it should not be).
After that the next few pages come out blacker than before.
This may not be your problem, and I should probably just buy a new cartrige,
but I wanted to share this little observation with the rest of the group. It
makes quite a difference on my printer, so it may help somebody else as
well.
Vlad
On 2/24/06, Radra <infositeus@...> wrote:
>
> Have you had the opportunity to examine your artwork transparency
> (mask) using a microscope? I wonder if it is better than mine. Wish
> I had some way to take a photomicrograph so I could post a photo.
>
> I was having some difficulty during the developing process. Some
> areas where the resist was supposed to dissolve away were not
> becoming completely clean. Assumed it might be due to the dark areas
> of my mask not being sufficiently opaque to UV. The dark areas
> actually appear grey, not black, when held up to a light. So I
> overlaid two masks to increase effective opacity. Placed the toner
> side of one mask against the toner side of a mirror image mask. The
> down side of this technique is that the toner image is now 4 mils
> away from the PCB due to the transparency thickness which, as you
> observed, will degrade resolution; but the resulting PCB was
> acceptable. In retrospect, I now suspect I did not have to overlay
> the masks, but instead only needed to improve the developing process.
>
> So the question I now have is "Does an inkjet printer produce better
> masks than does a laserjet printer?".
>
> Lyman
>
> <snip>
> > I use genuine epson inkjet transparency and ink in an old stylus
> >400 color printer and it gives excellent pinhole-free results and is
> >good for tracks and spacing smaller than 8mil.
> >
>
>
>
>
>
>
>
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>
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>
>
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Vlad's shop
http://www.krupin.net/serendipity/index.php?/categories/2-metalworking
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