Homebrew PCBs

Hi,
I'm fairly new to the group and finding your post's very useful. I have purchased and modified an Epson S21 printer and have been experimenting with Ink/Toner hybrid method.
The info available seems to say dust the wet ink with toner which I find works and produces a good tough coat of resist. I can't however stop a fine layer of toner sticking to the bare copper! 
Anybody using this method? if so, how do you apply the toner to stop this problem please.

Regards,
Brian

Just etch through it. Since the fine layer isn't enough to block the etchant, it undercuts the individual grains of toner and removes the copper anyway.

Or are you getting a solid coating on the bare copper? 

You can use a little bit of air or tapping to knock off excess toner, although that removes ANY toner, I find it doesn't remove much from the inked areas. I just let it sit for a while so the toner in the ink has a chance to really settle in, then I tap it upside down and sometimes blow on it a bit with canned air. Once in a while I have to manually clear areas between pads that are too close to each other by scraping off the toner with a sharp blade or probe.

Another issue is humidity... and static... there may be a fine balance between the two.

Please let us know how it goes and what you find works for you?

--
James.

--- In Homebrew_PCBs@yahoogroups.com, "g3umt" <g3umt@...> wrote:

>
> Hi,
> I'm fairly new to the group and finding your post's very useful. I have purchased and modified an Epson S21 printer and have been experimenting with Ink/Toner hybrid method.
> The info available seems to say dust the wet ink with toner which I find works and produces a good tough coat of resist. I can't however stop a fine layer of toner sticking to the bare copper! 
> Anybody using this method? if so, how do you apply the toner to stop this problem please.
> 
> Regards,
> Brian
>

I am unfamiliar with the hybrid method. I think I understand the procedure, at least to the extent that it has been explained in these posts ... but what is/are the advantage(s)?

--- In Homebrew_PCBs@yahoogroups.com, "jamesmichaelnewton" <jamesmichaelnewton@...> wrote:

>
> Just etch through it. Since the fine layer isn't enough to block the etchant, it undercuts the individual grains of toner and removes the copper anyway.
> 
> Or are you getting a solid coating on the bare copper? 
> 
> You can use a little bit of air or tapping to knock off excess toner, although that removes ANY toner, I find it doesn't remove much from the inked areas. I just let it sit for a while so the toner in the ink has a chance to really settle in, then I tap it upside down and sometimes blow on it a bit with canned air. Once in a while I have to manually clear areas between pads that are too close to each other by scraping off the toner with a sharp blade or probe.
> 
> Another issue is humidity... and static... there may be a fine balance between the two.
> 
> Please let us know how it goes and what you find works for you?
> 
> --
> James.
> 
> --- In Homebrew_PCBs@yahoogroups.com, "g3umt" <g3umt@> wrote:
> >
> > Hi,
> > I'm fairly new to the group and finding your post's very useful. I have purchased and modified an Epson S21 printer and have been experimenting with Ink/Toner hybrid method.
> > The info available seems to say dust the wet ink with toner which I find works and produces a good tough coat of resist. I can't however stop a fine layer of toner sticking to the bare copper! 
> > Anybody using this method? if so, how do you apply the toner to stop this problem please.
> > 
> > Regards,
> > Brian
> >
>

Point taken Steve,
  My apologies, it won't happen again!
  Regards,
  Brian

    
  When your software adds a SPAM to the header, it is -your- responsibility to remove it before posting to the list.

  That goes for those replying. Remove the "SPAM" in the header.

  Thank you,
  Steve Greenfield
  your grumpy neighborhood moderator




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