UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Other Discussions > Homebrew Equipment

Notices

Homebrew Equipment A place to show, design and discuss the weird and wonderful electronic creations from the hands of individual members.

Closed Thread
 
Thread Tools
Old 3rd Feb 2016, 12:14 am   #1
Oldcodger
Octode
 
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 1,490
Default PCB cleaning

I've got a bit of PCB, and I intend to iron on a laser writer print. But recently I've cleaned fingerprints off this PCB, with car polish stuff, but surface looks a bit greasy, even after a wash with Meths. Any suggestions ?
Oldcodger is offline  
Old 3rd Feb 2016, 1:36 am   #2
Radio Wrangler
Dekatron
 
Radio Wrangler's Avatar
 
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 13,099
Default Re: PCB cleaning

Car polish stuff is likely to contain some wax or silicone polish - even if it has a abrasive in it for paint 'restoration'

The original 'Belco' rubbing compound was polish-free so that the abraded surface was free of anything which would interfere with subsequent paint spraying. Brasso followed by detergent is what I've deoxidised and degreased raw PCB material with in the past.

David
__________________
Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
Radio Wrangler is offline  
Old 3rd Feb 2016, 2:19 am   #3
joebog1
Octode
 
joebog1's Avatar
 
Join Date: Jun 2015
Location: Mareeba, North Queensland, Australia
Posts: 1,096
Default Re: PCB cleaning

I use a green scotchbrite pot scrubber and a powder type bath cleaner like Ajax or Gumption, should those products be available in UK

Joe
joebog1 is offline  
Old 3rd Feb 2016, 6:59 am   #4
Diabolical Artificer
Dekatron
 
Diabolical Artificer's Avatar
 
Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 4,907
Default Re: PCB cleaning

Jif or should I say Cif and as Joe says a pan scrubber does the job and leaves it smelling nice too : ) We used to have Ajax Joe but they keep mucking about with the names, Toothpaste works too.

Andy.
__________________
Curiosity hasn't killed this cat...so far.
Diabolical Artificer is offline  
Old 3rd Feb 2016, 7:45 am   #5
dseymo1
Dekatron
 
Join Date: Dec 2007
Location: Shropshire, UK.
Posts: 3,052
Default Re: PCB cleaning

IME, Brasso also leaves a greasy residue.
I used it to polish a brass item prior to lacqering, and the lacquer wouldn't 'take' at all, but formed isolated pools on the surface. It took some thorough degreasing to resolve.
Cellulose thinners are pretty good for this sort of job.
dseymo1 is offline  
Old 3rd Feb 2016, 8:18 am   #6
jonmiller
Pentode
 
Join Date: Mar 2009
Location: Worcester, Worcestershire, UK.
Posts: 152
Default Re: PCB cleaning

I use these

http://uk.rs-online.com/web/p/pcb-cl...locks/2162706/
jonmiller is offline  
Old 3rd Feb 2016, 12:14 pm   #7
David Simpson
Nonode
 
Join Date: Mar 2008
Location: Aberdeen, UK.
Posts: 2,053
Default Re: PCB cleaning

Its supposed to be a "No No", but I still occasionally use CTC. In a well ventilated space, I'll hasten to add. Brings back evocative memories of the 60's.

Regards, David
David Simpson is offline  
Old 3rd Feb 2016, 1:04 pm   #8
Scimitar
Heptode
 
Scimitar's Avatar
 
Join Date: Oct 2015
Location: Gloucestershire, UK.
Posts: 568
Default Re: PCB cleaning

Automotive panel wipe is designed specifically to remove silicones and waxes before painting. There are various types, an alcohol fast, a spirit slow and a water based slow. I use the spirit slow mostly.
Scimitar is offline  
Old 3rd Feb 2016, 1:24 pm   #9
RF Burn
Pentode
 
RF Burn's Avatar
 
Join Date: Apr 2008
Location: Ramsgate, Kent, UK.
Posts: 231
Default Re: PCB cleaning

Common kitchen items like washing powder, jif/cif liquid cleaners, coca-cola... but avoid things like brillo pads or polishes which leave a waxy coating.

A quick soak in a tub of warm washing powder solution is my first port-of-call for cleaning metal surfaces and small parts, followed by a light brush down with an old toothbrush.
RF Burn is offline  
Old 3rd Feb 2016, 2:41 pm   #10
bikerhifinut
Octode
 
Join Date: Nov 2013
Location: Penrith, Cumbria, UK
Posts: 1,591
Default Re: PCB cleaning

In Common with Joe bog etc, I just use a non-impregnated pan scourer and a rinse in clean water. And air dry. So far I havent had any problems.
However I have only made PCB's in the traditional "Paint the resist on manually" way and I wonder if the small scratches left behind after using scourers and abrasive cleaners like Cif and "Hob brite" might affect the use of photo etch resists etc?
A.
bikerhifinut is offline  
Old 3rd Feb 2016, 6:45 pm   #11
G6Tanuki
Dekatron
 
G6Tanuki's Avatar
 
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 8,261
Default Re: PCB cleaning

I use industrial-grade wire-wool (as traditionally used by plumbers to clean copper pipes before soldering...) and then wash down with IPA to remove grease/fingerprints. A quick blast with a hairdryer to make sure all the IPA is evaporated, and bob's yeruncle as they say.
G6Tanuki is offline  
Old 3rd Feb 2016, 10:52 pm   #12
Oldcodger
Octode
 
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 1,490
Default Re: PCB cleaning

Been a long time( 20 years ) since I did any PCB work, and then I used a bit of wet & dry ,followed by a wash with a crème cleaner mixed with washing up liquid, to get the surface to hold as much of a pool of water as possible. looks like it's back to the old ways, then. i've got a double sided wet & dry sponge block . I was trying to find a method that veered away from any abrasive method, as I'm going to try ( fro the first time) the iron on using a laser printer method, and worry about ink not getting into any scratches.
Oldcodger is offline  
Old 4th Feb 2016, 12:43 am   #13
joebog1
Octode
 
joebog1's Avatar
 
Join Date: Jun 2015
Location: Mareeba, North Queensland, Australia
Posts: 1,096
Default Re: PCB cleaning

The "Cif, Ajax, Toothpaste etc etc is only very mildly abrasive.
Sanding blocks are just so!! for sanding large amounts of material.
Even 1000 grit is far too harsh for a decent PCB image.

G6Tanuki should be aware that if the tinyiest particle of steel wool is left behind, and you use Ferric Chloride as the etchant, there will be a large hole eaten into the copper.
I know!! I used to use steel wool myself!


Sorry Oldcodger,
G6Tanuki
joebog1 is offline  
Old 4th Feb 2016, 10:09 pm   #14
Oldcodger
Octode
 
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 1,490
Default Re: PCB cleaning

Wet & dry ,with a creme cleaner ,mixed with washing up liquid was what I used when I last did PCB ,with transfers and a pen or a permanent marker, and had few problems. But I've got the board nice and clean and shiny now, so I'm tempted to use a crème cleaner + washing up liquid to get rid of the stuff the car polish left behind ,as I'm going to try the iron method.
Oldcodger is offline  
Old 4th Feb 2016, 11:30 pm   #15
joebog1
Octode
 
joebog1's Avatar
 
Join Date: Jun 2015
Location: Mareeba, North Queensland, Australia
Posts: 1,096
Default Re: PCB cleaning

In answer to biker, I use spray on positive resist, and my method of cleaning works perfectly. I use the sun as my UV point source, for exposure through the track design which is printed by inkjet ( laser is better) onto overhead projection clear sheets.

Joe
joebog1 is offline  
Old 25th Feb 2016, 11:19 pm   #16
Oldcodger
Octode
 
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 1,490
Default Re: PCB cleaning

Thanks, Joe- I've never had any success from the UV method (both in UK with a light box and abroad with strong UV). Problem is that I've always used transfers and pen or pen, and had no problems. But now I'm looking at dedicated PC program (Express PCB) allied to my old laser printer (or failing that print from my inkjet in high quality and use one of the small shops with laser copying facilities).
Next problem (and I've added to my original topic, hoping mods will think, like me, it's more appropriate and less messy than having several posts on a similar topic), is ---has anyone found the best temperature on the iron for optimum ink transfer.
Oldcodger is offline  
Old 25th Feb 2016, 11:28 pm   #17
astral highway
Dekatron
 
astral highway's Avatar
 
Join Date: Nov 2006
Location: London, UK.
Posts: 3,013
Default Re: PCB cleaning

Dishwasher!
__________________
Al
astral highway is offline  
Old 26th Feb 2016, 12:27 am   #18
FRANK.C
Heptode
 
FRANK.C's Avatar
 
Join Date: Feb 2006
Location: Roscommon, Ireland
Posts: 610
Default Re: PCB cleaning

I have had varying success with the iron but never perfect. The last PCB that I made I used a laminator instead of a iron and ran it through about 5 times, it came out perfect. I have not tried it again yet so that one time may be a fluke.

Frank
FRANK.C is offline  
Old 26th Feb 2016, 1:33 pm   #19
wireless_john
Hexode
 
wireless_john's Avatar
 
Join Date: Apr 2011
Location: Gosport, Hampshire, UK.
Posts: 376
Default Re: PCB cleaning

I clean mine with cif/jif. Hadn't thought of the dishwasher though.
__________________
GQRP Club 4704 - BVWS Member
wireless_john is offline  
Old 27th Feb 2016, 12:25 am   #20
Oldcodger
Octode
 
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 1,490
Default Re: PCB cleaning

My dishwasher will be the one who wields the iron (and also has an excellent rolling pin arm ), so I think in the interests of domestic harmony, I'll clean the PCB myself.
Reason I asked about temperature is that there's a note from a previous owner not to put Melamine in Laser printer, but any printed sheet never feels that warm.

However, the laminator idea might be worth looking at for those who use light boxes. Print PCB layout to paper using a laser printer. Then pass paper and laminator sheet through laminator where laser toner should be transferred (in theory) to clear sheet, ready for lightbox.
Oldcodger is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 3:45 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Copyright ©2002 - 2020, Paul Stenning.