Homebrew PCBs

Okay, it's been about 30 minutes and the paper floated off - got good 
transfer.  However, there is a white film, almost like extremely thin 
paper still on the toner - don't know what it is but not sure if it 
matters or not.  Is it okay to etch it with this still on the board?

For what it is worth, this circuit, albeit very simply has the finest 
traces and the closest together I have done to date.  If it etches 
good, this is great!

Chris

You usually have to remove that residue. A soft bristle brush (old tooth 
brush) does the trick with the paper I use.
  I find if I leave it on with epson glossy paper, it won't etch though the 
residue and I get bridges.
  If it was totally water soluble it would have come off with the paper.

-carl

At 04:29 PM 10/24/2005, you wrote:

>Okay, it's been about 30 minutes and the paper floated off - got good
>transfer.  However, there is a white film, almost like extremely thin
>paper still on the toner - don't know what it is but not sure if it
>matters or not.  Is it okay to etch it with this still on the board?
>
>For what it is worth, this circuit, albeit very simply has the finest
>traces and the closest together I have done to date.  If it etches
>good, this is great!
>
>Chris
>

--- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing" 
I have used drug store isopropyl alcohol, on warm (not hot) boards 
and the Epson paper floats off in a couple of minutes (like 3 or 4 
min.) A small bit of white residue remains along the edges of the 
traces, a soft brush and a cork headed straight pin cleans this up 
easy.

<lcdpublishing@y...> wrote:
>
> Okay, it's been about 30 minutes and the paper floated off - got 
good 
> transfer.  However, there is a white film, almost like extremely 
thin 
> paper still on the toner - don't know what it is but not sure if 
it 
> matters or not.  Is it okay to etch it with this still on the 
board?
> 
> For what it is worth, this circuit, albeit very simply has the 
finest 

> traces and the closest together I have done to date.  If it etches 
> good, this is great!
> 
> Chris
>