Araldite Pigment Additive Query

This topic has 14 replies, 12 voices, and was last updated 23 November 2015 at 14:11 by pgk pgk.

Viewing 15 posts - 1 through 15 (of 15 total)

Author

Posts
22 November 2015 at 16:22 #213611
ChrisH
Participant
@chrish
Not exactly model engineering but definitely a workshop related query:

We have a black composite sink in our kitchen, which now has a small (say 5mm dia.) chip in it revealing a white sub-surface. Not exactly discrete! Would be 'no-worries' had the sub-surface been black, but white…..

Had thought to repair chip and disguise same by applying a wee amount of Araldite epoxy resin, but what to use as a black pigment to try and ensure the repair sort-of blends in?

Any ideas anyone then, for a black pigment to add to Araldite epoxy resin? There might be a bonus "shed exit visa" in it for me from Senior Management if I get the repair right, so I need your help!

Chris
Advert

22 November 2015 at 16:22 #24236
ChrisH
Participant
@chrish
22 November 2015 at 16:33 #213613
KWIL
Participant
@kwil
Get a sample size of black pigment for cement mortar, should outlast the sink!!
22 November 2015 at 16:33 #213614
John Rudd
Participant
@johnrudd16576
Black paint?

I've used cellulose based paint as an additive to colour epoxy before today…worked for me..😃
22 November 2015 at 16:34 #213615
David Clark 13
Participant
@davidclark13
You can get black acrylic repair kits for about £13. They are usually acrylic on a fibreglass base hence the white underneath.
22 November 2015 at 16:40 #213617
JasonB
Moderator
@jasonb
Photo copy toner powder or some proper polyester resin pigment
22 November 2015 at 16:41 #213620
Anonymous
What about black cement dye? not expensive and I think JB Weld would probably work better as it's already half way there being grey. You'll probably have to do a bit of experimenting as a "proper" black can be a pain to obtain in a lot of dyeing applications, anodising, cloth dyeing etc
22 November 2015 at 17:37 #213625
Brian Wood
Participant
@brianwood45127
Mix in some graphite powder, I've done something simillar as a filler for cast iron by adding metal swarf as well from the bandsaw and 'tinting' the patches with black marker pen. It looked quite convincing

Brian.
22 November 2015 at 17:57 #213629
Michael Cox 1
Participant
@michaelcox1
Hi Chris,

The ideal material would be carbon black but it is difficult to find in small quantities. I have some black powder that is used for powder coating steel articles. This is basically a mixture of carbon black with a thermoplastic. It is very fine particles (they float in air). If you want to try this to pigment the epoxy I can send you a small quantity by post. Send me a pm if you are interested.

Mike
22 November 2015 at 18:53 #213641
David Clark 13
Participant
@davidclark13
I think toner powder is carcinogenic.
22 November 2015 at 18:58 #213642
ChrisH
Participant
@chrish
Wow, what a fast response by so many – thanks chaps.

I was thinking of going down the route of trying a few test pieces first using Hammerite black, car body spray black, a a drop of black from a Sharpie, but now I have Michael's kind offer I will try that first, so sending you a pm Mike.

Chris
23 November 2015 at 09:30 #213712
Ian S C
Participant
@iansc
In ME a good many years back there was a clock article, and it was suggested that Araldite mixed with lamp black was ideal for filling etched numbers on the clock face. Lamp black, candle smoke.

Ian S C
23 November 2015 at 13:41 #213747
Neil Wyatt
Moderator
@neilwyatt
I followed advice off the net when fixing some chips in floor tiles. Ivory humbrol enamel and cheap epoxy worked OK, but the colour match wasn't perfect,. but better pale patched than big brown chips! Black should work fine. It was mostly epoxy with very little paint.

Neil
23 November 2015 at 14:02 #213753
Douglas Johnston
Participant
@douglasjohnston98463
If I remember correctly JB Weld epoxy is black in colour and would make a good repair choice.

Doug

edit:

Just spotted JB Weld mentioned above as being more grey than black so perhaps not so good.

Edited By Douglas Johnston on 23/11/2015 14:07:51
23 November 2015 at 14:11 #213754
pgk pgk
Participant
@pgkpgk17461
I've used 'nail art' coloured glitter mixed with epoxy to fill check areas of timber. They do a black glitter as well. If you want it matt then ordinary carbon should do…as mentioned lamp black is classic..or any soot. I swept the chimney last week or you could have had a bucket-full. Even burn toast could be a source – or any of my wife's cooking….
Author

Posts