Anodising in Black - diyAudio
Go Back   Home > Forums > General Interest > Everything Else

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 7th June 2008, 11:13 AM   #1
bulgin is offline bulgin  South Africa
diyAudio Member
 
Join Date: May 2006
Default Anodising in Black

Hi

I regularly anodise small components. Sometimes blue (for which I have professional tint) sometimes in 'natural' and recently in simulated 'gold'.

If there are diy anodisers on the forum, I've had very good results with simulated gold by using Moir's Egg Yellow food colouring - mixed to have a ph of 5.5.

I have good equipment and chemicals - some bought from a local anodising chemical and equipment supplier and some built by myself. So, job preparation before anodising is not an issue.

Right now, I am required to supply a small, 5mm thick spacer for a phono cartridge, anodised black, which I have never done. Well, making the spacer was no problem.

I checked the various anodising sites and the product Dylon Ebony Black Multipurpose Dye came up.

I had bought 2 containers long before and used one of these mixed in to 1 litre of deionised water and then adjusted the ph to 5.5 using chemicals I have here. The mix was prepared cold and after the anodising process, the temperature of the tint mix was raised to 55 degrees. Before immersion, I kept a small container of the tint mix separately at room temperature for pre-colouring while the alu oxide pores were still open. After that, I immersed the spacer in the hot tint mix for about 1/2 hour - which is much longer than for the other colours I use.

My best results were a kind of bronze colour. Not black enough.

After more web googling, I came across a comment somewhere of using 4X the amount of Dylon for a denser black.

Following the same procedures as described, I tried the new mix and the results were almost the same, if not worse.

This morning, I checked Dylon's own website and saw for a denser black (for clothes dyeing), they add their colour Tangerine to the black.

I might add that the amperes used was correct ( the two small objects drew about 0.3amperes @ 16V and the anodising layer was even and took quite a while to strip off again with boiling phosphoric acid.

Other than ordering 'professional' black anodising tint, has anyone here at diyaudio used Dylon black with good results for black anodising?

Much obliged for some advice or feedback.

bulgin
  Reply With Quote
Old 7th June 2008, 11:44 PM   #2
OzMikeH is offline OzMikeH  Australia
diyAudio Member
 
Join Date: Mar 2007
I have no experience with anodizing, but I used to do a lot of professional chassis work.

We made a point of NOT using black permanent markers for any marking out because it was impossible to remove all traces of it. there was always a ghost left no matter how you cleaned it with whatever solvent. Red, green and blue markers were very easy to clean.

We had a selection of black markers with a high pigment content we used to use for touching up damage on the black anodized parts.

If all else fails you can break a black marker in half and "paint" it with the wad of felt from inside the marker.

you might be able to extract the fluid from a whiteboard or permanent marker and use that.

sorry I couldn't be of more assistance.
__________________
Help some guys with funny hair bang two rocks together really hard.
http://athome.web.cern.ch/athome/LHCathome/whatis.html
  Reply With Quote
Old 8th June 2008, 08:51 AM   #3
bulgin is offline bulgin  South Africa
diyAudio Member
 
Join Date: May 2006
Default Anodising in black

Hi Mike

Thanks for the kind reply. If the job was for myself, I'd do the black marker thing. Your tip definitely works when re-touching previously black anodised faceplates, for example. I've added a refinement to this when I use them for such an application. Since black markers show up shiny against matte black, I usually apply a few times and let dry in between. I then take a cloth and give the spot a few wipes, which goes matter black. Almost impossible to detect afterwards.

I guess I'll have to bite the bullet and mill the thing in either ebonite or african blackwood. Or go and buy the correct anodising black

I've stripped the object again last night and re-anodised but not sealed it yet.

I'm giving it one more shot with Parker black ink.

Cheers

bulgin
  Reply With Quote
Old 8th June 2008, 10:40 AM   #4
Shaun is offline Shaun  South Africa
diyAudio Member
 
Shaun's Avatar
 
Join Date: Aug 2001
Location: Cape Town, South Africa
Bulgin

Perhaps not for your immediate project, but it might be worth experimenting with photocopier toner. Might entail heating of the part... just a thought.
__________________
Shaun Onverwacht
|||||||||| DON'T PANIC ||||||||||
  Reply With Quote
Old 8th June 2008, 11:43 AM   #5
diyAudio Member
 
Join Date: Jun 2006
As a gunsmith, I often faced similar finish issues.

http://lwww.lauerweaponry.com/duraco...l&Category=229

This is a very durable catalyzed finish that any hobiest can apply.

Very similar to factory HK finish.

John C.
  Reply With Quote
Old 8th June 2008, 11:50 AM   #6
Account disabled at member's request
 
MJL21193's Avatar
 
Join Date: Mar 2007
How about powered fabric dye?
  Reply With Quote
Old 9th June 2008, 12:13 AM   #7
bulgin is offline bulgin  South Africa
diyAudio Member
 
Join Date: May 2006
Default Anodising in black

Hello All

Thanks once more for all your kind views and replies. I'm running out of time on this job which also involve another item which goes with the spacer.

The photocopier toner is worth a try if it can dissolve in deionised water and if the ph can be adjusted to 5.5. As it is, I do have some toner cartridges for a copier I don't have any more.

Anyway, I had an option to make it from african blackwood but due to the slots I decided to use ebonite to avoid possible cracking when the cart gets screwed down.

I will look again at the gunsmithing black or bite the bullet and buy professional anodising tint in black.

Cheers

bulgin
Attached Images
File Type: jpg img_0002.jpg (44.1 KB, 135 views)
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Aluminum Anodising - Actually very simple. GlidingDutchman Everything Else 16 3rd June 2008 11:05 AM
Anodising Alep5 : what color ??? ElectroNick Pass Labs 72 8th April 2005 07:45 PM
Anodising aluminium ericpeters Everything Else 3 11th June 2004 09:44 PM
The Man in Black is gone Peter Daniel Music 10 14th December 2003 11:19 PM
The black dot peranders Forum Problems 5 7th February 2003 03:00 PM


New To Site? Need Help?

All times are GMT. The time now is 02:54 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2