Rick
I have to use a heater in my Ferric etch tank to get to a reasonable etch temperature to give an etch time of 7 mins and that is set to 30'C, 86'F
I do use the Edinburgh etch formula, with citric acid added, and that seems to speed up each time I use it.
Malcolm
I don't suffer from insanity I enjoy it!
Mene, mene, tekel, upharsin
The writing is on the wall.
Ha-ktovet al ha-kir
--------------------------------------------
On Wed, 7/31/13, Rick Sparber <rgsparber@...> wrote:
Subject: RE: [Homebrew_PCBs] Re: Easy Fast Laser Print DIY Circuit Boards - Dave's toner-transfer freezing technique
To: Homebrew_PCBs@yahoogroups.com
Date: Wednesday, July 31, 2013, 1:50 AM
Well, I learned a few things today. The most
important lesson was that parchment paper does work but I
had to use a roller after running it through the laminator
10 times. I also learned that 15 minutes in the freezer was
enough.
Using some used ferric chloride, I etched a small copper
plate for 12 minutes. It took off maybe 0.001" of metal
which is certainly enough to see the raised letters. Maybe
of more surprise was that the toner did not break down. The
solution was at ambient temperature which is about 106°
since I was outside here in Phoenix.
Without using the roller, the toner would not transfer from
parchment paper to copper plate. I also had zero luck with
Avery label backing paper. I used a single piece of 3M magic
tape over the 1/4" x 3/4" piece of artwork and
that worked fine. Maybe a lower quality tape would fall off
in the freezer. That would be nice.
Rick
-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com
[mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of Rick Sparber
Sent: Tuesday, July 30, 2013 7:58 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: RE: [Homebrew_PCBs] Re: Easy Fast Laser Print DIY
Circuit Boards - Dave's toner-transfer freezing
technique
The test has begun. I printed out some artwork using
Microsoft Word and my HP laser printer. I'm using
silicone based parchment paper. The artwork is mostly black
with white letters so the letters should etch out. I used
the "WordArt" feature inside Word to mirror image
the text.
I cut out one of the four test coupons and taped it at the
ends on a piece of thin copper plate. I'm using 3M Matte
Finish Magic Tape.
I then ran it through my laminator 10 times. It is now in
the freezer with 21 minutes to go.
One mistake I think I made was to not tape it all the way
around. Before placing in the freezer, I saw places on the
side where the artwork lifted up. If this is a show stopper,
I will clean off the copper and use another coupon.
Using the laminator is pure genus!
Rick
-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com
[mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of David Pickering
Sent: Tuesday, July 30, 2013 1:07 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Re: Easy Fast Laser Print DIY
Circuit Boards - Dave's toner-transfer freezing
technique
That's the one Robin
As I said it does come in rolls and its quite thin so you
will need to flatten it out, if in no rush just put it
between some books for a couple of days, if urgent just run
it through the laminator a couple of times
________________________________
From: Robin Whittle <rw@...>
To: Homebrew_PCBs@yahoogroups.com
Sent: Tuesday, 30 July 2013, 8:05
Subject: Re: [Homebrew_PCBs] Re: Easy Fast Laser Print DIY
Circuit Boards - Dave's toner-transfer freezing
technique
Hi Dave,
Thanks - I ordered this material:
http://www.ebay.com/itm/170900415631
A4 10Pcs Sheets Heat Toner Transfer Paper For DIY
PCB Electronic Prototype
1,677 sold. It cost AUD$2.21 including shipping from Hong
Kong from
seller http://myworld.ebay.com/shcfstore.
- Robin
On 2013-07-30 4:39 PM, David Pickering wrote:
> The paper and supplier that I have been using is on the
page you
> sent marked dib-bid and the suppliers name is
shcfstore.
[Non-text portions of this message have been removed]
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Be sure to visit the group home and check for new Links,
Files, and Photos:
http://groups.yahoo.com/group/Homebrew_PCBsYahoo!
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