Homebrew PCBs

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@firstpr.com.au>
 
 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]
 
 
 
 ------------------------------------
 
 
 
 Be sure to visit the group home and check for new Links,
 Files, and Photos:
 
 http://groups.yahoo.com/group/Homebrew_PCBsYahoo!
 Groups Links
 
 
 
 ------------------------------------
 
 
 
 Be sure to visit the group home and check for new Links,
 Files, and Photos:
 
 http://groups.yahoo.com/group/Homebrew_PCBsYahoo!
 Groups Links