Homebrew PCBs

Clark,
I have used the Pulsar toner transfer quite successfully on .005 & .010 brass sheet, and yes, there is some undercutting. It will take a bit of dimensional trial and error if you need high precision.
Regards,
Roger

Hi Roger...thanks for the reply! Do you have opinion about whether the
Pulsar process would be different, better, cheaper, or easier than the
waxed-paper-from-China toner-transfer method?
Clark


On Fri, Aug 23, 2013 at 12:57 PM, RogerRetro <Roger.Blair@...>wrote:

> **
>
>
> Clark,
> I have used the Pulsar toner transfer quite successfully on .005 & .010
> brass sheet, and yes, there is some undercutting. It will take a bit of
> dimensional trial and error if you need high precision.
> Regards,
> Roger
>
>  
>


[Non-text portions of this message have been removed]

> Clark wrote: 
> <SNIP>
> Do you have opinion about whether the
> Pulsar process would be different, better,
> cheaper, or easier than the waxed-paper-
> from-China toner-transfer method?

Brass etching is very on topic for here.

You use brass shims to apply solder paste.

Pulsar process will be better as you also
have the TRF Green layer to help block out
pinholes.  The chinese wax/plastic paper
will only have a bare toner layer.

If you want to etch brass I recommend using
photo.  Much less likely to have unsightly
pinholes come through somewhere you wanted
it all shinny and clean.

I have etched a LOT of brass in my time and
I can def. say that Pulsar with TRF is a 
giant step up from bare toner and then
photo is a leap in quality again.

Hi Clark,
I haven't yet tried the process with the "China" paper, whatever it 
is... I did get some to try when I have time (which won't be soon, due 
to other projects). It appears somewhat similar to the backing on 
contact paper.
I have on occasion used plastic model paint to touchup pinholes if they 
apear too big for the green film to cover...  many decisions are 
variable based on the overall size and geometry of the parts to be 
etched. The parts I was working with were small, roughly 1/4x1/2 inch or 
so in size with holes and tabs... With care I held to a couple of 
thousanths overall tolerance. Its been a few years now since I've done 
anything along these lines...
Roger
------ Original Message ------

From: "Misc Clark" <clark.cone4@...>
To: Homebrew_PCBs@yahoogroups.com
Sent: 8/23/2013 10:36:37 AM
Subject: Re: [Homebrew_PCBs] Etching Brass
>Hi Roger...thanks for the reply! Do you have opinion about whether the
>Pulsar process would be different, better, cheaper, or easier than the
>waxed-paper-from-China toner-transfer method?
>Clark
>
>
>On Fri, Aug 23, 2013 at 12:57 PM, RogerRetro 
><Roger.Blair@...>wrote:
>
>>  **
>>
>>
>>  Clark,
>>  I have used the Pulsar toner transfer quite successfully on .005 & 
>>.010
>>  brass sheet, and yes, there is some undercutting. It will take a bit 
>>of
>>  dimensional trial and error if you need high precision.
>>  Regards,
>>  Roger
>>
>>
>>
>
>
>[Non-text portions of this message have been removed]
>
>
>
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