On Sun, 9 Jul 2017 21:31:37 +0000 (UTC), you wrote:
>I have been using Toner Transfer with very good results!
>I scrub my boards with very fine scotch-brite pads. They are grey colored and they are available
>at auto parts stores. They are finer than 220 grit and give good tooth for the toner to attach to.The green ones in the supermarket are usable but they are a coarser grit.I use Isopropyl alcohol or acetone. the other cleaners are ok also but you have to rinse the board well.
What I use:
scrub the boards with 1000 or 1200 grit wet/dry paper. Using it wet
is fine.
use something like bon-ami to clean the boards.
rinse them.
wipe with acetone to eliminate oil. You may see some copper dust.
Print and then run through laminator.
What you want is enough heat to make the toner adhere. For small
boards (less than 4x6 inches) I use about 6 to 8 passes. For larger
boards (perhaps more than that) I'd do 8 or so.
What you want is the board to be hot enough to soften the toner, make
it sticky, and let it adhere to the board.
I then (after the board runs through 6 or 8 times, 3 or 4 upwards, 3
or 4 downwards), dump it directly into room temperature water.
blow dry with hair dryer
run through same laminator twice with green foil (not tried other
ones).
Let that cool
peel off
etch
sand off toner with wet/dry paper, 1000 grit is fine.
(keeps acetone dissolved toner from discoloring board. Your choice.)
Tin as needed,
rinse!!!
(tin/lead is nasty stuff)
Dry in sun, etc
rinse and use.
10/10 is reliable with this. Never tried 8/8.
Harvey
>I gave up on using an iron! I found a top of the line GBC H525 laminator on line and I got it withshipping for less than $100 on ebay. I pass my boards through 10 times.
>regards
>Mike
>
>
> On Sunday, July 9, 2017 11:07 AM, "Rob roomberg@... [Homebrew_PCBs]" <Homebrew_PCBs@yahoogroups.com> wrote:
>
>
> I had not tried alcohol.
> I've been using 220 grit sandpaper per your advice...since a year ago?
> Then I used acetone to clean up the fingerprint oil and sanding dirt.
> Not that fingerprints are a problem... I always wear heavy 9mil nitrile gloves when playing with PCBs.
>
> Is the iso-prpyl wipe anything more than or different than using a tough paper towel and 91% alcohol?
>
> I had experimented with transfer craft metallic foil but really didn't need the foil after using a Sharpie.
> I can see using the foil for massively complicated or detailed circuits that would test patience tracing a whole board with a Sharpie. But nothing I do is that complicated.
>
>
>
> On 07/09/2017 10:29 AM, AncelB mosaicmerc@... [Homebrew_PCBs] wrote:
>
> Genuine or non oem HP toner works for me. For the pitting problem I
> transfer craft metallic foil on top of the toner before etching. It's a
> well known practice and reliable.
>
> Rather than using acetone or citronella to prepare/clean the copper I
> use 220 grit sandpaper and an iso-propyl wipe which makes the toner
> 'grip' the oil free copper. Even fingerprints can interfere so handle
> the edges of the PCB. As a test I polished/lapped copper and tried the
> identical transfer with poor results all other things being the same.
>
> Also, before I did the metal foiling, I used to use a silver sharpie to
> 'fill' in the toner transfer for any breaks or potential pitting and
> then etch.
>
> I have done literally hundreds of double sided boards and even boards
> for RF use to 1Ghz with toner transfer. It works.
>
> Ancel
>
>
>
> #yiv9591100991 #yiv9591100991 -- #yiv9591100991ygrp-mkp {border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;}#yiv9591100991 #yiv9591100991ygrp-mkp hr {border:1px solid #d8d8d8;}#yiv9591100991 #yiv9591100991ygrp-mkp #yiv9591100991hd {color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;}#yiv9591100991 #yiv9591100991ygrp-mkp #yiv9591100991ads {margin-bottom:10px;}#yiv9591100991 #yiv9591100991ygrp-mkp .yiv9591100991ad {padding:0 0;}#yiv9591100991 #yiv9591100991ygrp-mkp .yiv9591100991ad p {margin:0;}#yiv9591100991 #yiv9591100991ygrp-mkp .yiv9591100991ad a {color:#0000ff;text-decoration:none;}#yiv9591100991 #yiv9591100991ygrp-sponsor #yiv9591100991ygrp-lc {font-family:Arial;}#yiv9591100991 #yiv9591100991ygrp-sponsor #yiv9591100991ygrp-lc #yiv9591100991hd {margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;}#yiv9591100991 #yiv9591100991ygrp-sponsor #yiv9591100991ygrp-lc .yiv9591100991ad {margin-bottom:10px;padding:0
0;}#yiv9591100991
>#yiv9591100991actions {font-family:Verdana;font-size:11px;padding:10px 0;}#yiv9591100991 #yiv9591100991activity {background-color:#e0ecee;float:left;font-family:Verdana;font-size:10px;padding:10px;}#yiv9591100991 #yiv9591100991activity span {font-weight:700;}#yiv9591100991 #yiv9591100991activity span:first-child {text-transform:uppercase;}#yiv9591100991 #yiv9591100991activity span a {color:#5085b6;text-decoration:none;}#yiv9591100991 #yiv9591100991activity span span {color:#ff7900;}#yiv9591100991 #yiv9591100991activity span .yiv9591100991underline {text-decoration:underline;}#yiv9591100991 .yiv9591100991attach {clear:both;display:table;font-family:Arial;font-size:12px;padding:10px 0;width:400px;}#yiv9591100991 .yiv9591100991attach div a {text-decoration:none;}#yiv9591100991 .yiv9591100991attach img {border:none;padding-right:5px;}#yiv9591100991 .yiv9591100991attach label {display:block;margin-bottom:5px;}#yiv9591100991 .yiv9591100991attach label a
>{text-decoration:none;}#yiv9591100991 blockquote {margin:0 0 0 4px;}#yiv9591100991 .yiv9591100991bold {font-family:Arial;font-size:13px;font-weight:700;}#yiv9591100991 .yiv9591100991bold a {text-decoration:none;}#yiv9591100991 dd.yiv9591100991last p a {font-family:Verdana;font-weight:700;}#yiv9591100991 dd.yiv9591100991last p span {margin-right:10px;font-family:Verdana;font-weight:700;}#yiv9591100991 dd.yiv9591100991last p span.yiv9591100991yshortcuts {margin-right:0;}#yiv9591100991 div.yiv9591100991attach-table div div a {text-decoration:none;}#yiv9591100991 div.yiv9591100991attach-table {width:400px;}#yiv9591100991 div.yiv9591100991file-title a, #yiv9591100991 div.yiv9591100991file-title a:active, #yiv9591100991 div.yiv9591100991file-title a:hover, #yiv9591100991 div.yiv9591100991file-title a:visited {text-decoration:none;}#yiv9591100991 div.yiv9591100991photo-title a, #yiv9591100991 div.yiv9591100991photo-title a:active, #yiv9591100991 div.yiv9591100991photo-title a:hover,
>#yiv9591100991 div.yiv9591100991photo-title a:visited {text-decoration:none;}#yiv9591100991 div#yiv9591100991ygrp-mlmsg #yiv9591100991ygrp-msg p a span.yiv9591100991yshortcuts {font-family:Verdana;font-size:10px;font-weight:normal;}#yiv9591100991 .yiv9591100991green {color:#628c2a;}#yiv9591100991 .yiv9591100991MsoNormal {margin:0 0 0 0;}#yiv9591100991 o {font-size:0;}#yiv9591100991 #yiv9591100991photos div {float:left;width:72px;}#yiv9591100991 #yiv9591100991photos div div {border:1px solid #666666;min-height:62px;overflow:hidden;width:62px;}#yiv9591100991 #yiv9591100991photos div label {color:#666666;font-size:10px;overflow:hidden;text-align:center;white-space:nowrap;width:64px;}#yiv9591100991 #yiv9591100991reco-category {font-size:77%;}#yiv9591100991 #yiv9591100991reco-desc {font-size:77%;}#yiv9591100991 .yiv9591100991replbq {margin:4px;}#yiv9591100991 #yiv9591100991ygrp-actbar div a:first-child {margin-right:2px;padding-right:5px;}#yiv9591100991 #yiv9591100991ygrp-mlmsg
>{font-size:13px;font-family:Arial, helvetica, clean, sans-serif;}#yiv9591100991 #yiv9591100991ygrp-mlmsg table {font-size:inherit;font:100%;}#yiv9591100991 #yiv9591100991ygrp-mlmsg select, #yiv9591100991 input, #yiv9591100991 textarea {font:99% Arial, Helvetica, clean, sans-serif;}#yiv9591100991 #yiv9591100991ygrp-mlmsg pre, #yiv9591100991 code {font:115% monospace;}#yiv9591100991 #yiv9591100991ygrp-mlmsg ∗ {line-height:1.22em;}#yiv9591100991 #yiv9591100991ygrp-mlmsg #yiv9591100991logo {padding-bottom:10px;}#yiv9591100991 #yiv9591100991ygrp-msg p a {font-family:Verdana;}#yiv9591100991 #yiv9591100991ygrp-msg p#yiv9591100991attach-count span {color:#1E66AE;font-weight:700;}#yiv9591100991 #yiv9591100991ygrp-reco #yiv9591100991reco-head {color:#ff7900;font-weight:700;}#yiv9591100991 #yiv9591100991ygrp-reco {margin-bottom:20px;padding:0px;}#yiv9591100991 #yiv9591100991ygrp-sponsor #yiv9591100991ov li a {font-size:130%;text-decoration:none;}#yiv9591100991 #yiv9591100991ygrp-sponsor
>#yiv9591100991ov li {font-size:77%;list-style-type:square;padding:6px 0;}#yiv9591100991 #yiv9591100991ygrp-sponsor #yiv9591100991ov ul {margin:0;padding:0 0 0 8px;}#yiv9591100991 #yiv9591100991ygrp-text {font-family:Georgia;}#yiv9591100991 #yiv9591100991ygrp-text p {margin:0 0 1em 0;}#yiv9591100991 #yiv9591100991ygrp-text tt {font-size:120%;}#yiv9591100991 #yiv9591100991ygrp-vital ul li:last-child {border-right:none !important;}#yiv9591100991
>
>