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Thread: Black shellac a ybody?
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6th July 2023, 05:57 PM #1
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Black shellac a ybody?
Has anyone ever come across genuinely black shellac? Looking for some to apply to an Indian Ink finish to protect the finish
regards,
Dengy
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6th July 2023, 06:19 PM #2
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Perhaps add black pigment to shellac
John
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6th July 2023, 07:42 PM #3
Spirit Black and add a touch of Bismarck Brown which is a red colour . The touch of red sends it from a blue black to a jet black . Being spirit colours it stays 100 % liquid unlike Black oxide pigment which leaves it with the body of the pigment and more opaque.
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9th July 2023, 11:51 PM #4
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You can colour up your shellac using Feast Watson's Prooftints as well. The black will vary depending on the shellac you're using - a bleached or blonde shellac with black Prooftint will be toward a blue, but garnet or ruby shellac will give you a warmer black.
Nigrosine which is alcohol soluble gives the truest traditional black - used on grand pianos. But I don't know if anyone stocks it in Australia any longer.
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10th July 2023, 09:10 AM #5
Very interesting, very commonly used too. Nigrosine|Nigrosin|Nigrosine Black|Solvent Black 5|Solvent Black 7|Acid Black 2|Pigment Black 1 (epsilonpigments.com)
Seems it's still available in Oz.
Dyes-Aniline Powder : Dye, Aniline, Powder, SPIRIT (ALCOHOL) Soluble, Black, (thewoodworks.com.au)Mobyturns
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10th July 2023, 12:04 PM #6
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Mobyturns if you're going to try nigrosine, you'll need to dissolve it in denatured alcohol first, strain it through a disposable paint filters as you add it to your shellac, and I'd filter the shellac again before use. And a little goes a loooonnnnng way.
Any particles that haven't dissolved, and there will a bit, are removed before you try and rubber it on. Otherwise it's streaky and gritty. Not a good outcome.
Also this definitely works best using a rubber. It's difficult to get a decent flat finish using brushes. And you can use oil and pumice with nigrosine black shellac if you're after a fully chocked mirror finish.
If your Indian ink is also alcohol based, put a few wash coats of clear shellac over it first. Then go to town with the black shellac.
There is also a restorer's trick of smashing and dissolving 78s in alcohol - they were made of shellac and the colour you get is a dirty green black that is used to colour match when restoring. Though I suspect you'd struggle to find 78s for a price you'd then take to them with a hammer...
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10th July 2023, 12:12 PM #7
I just spoon a few scoops of spirit black into a jar and cover with metho. The sediment settles to the bottom and the jar lasts a year or more with me taking what I need out as it’s used .
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10th July 2023, 02:33 PM #8
More a curiosity and learning thing for me. Thankyou both for sharing your wealth of knowledge and experience.
About the only thing I might, and it's a remote might, try it on is to ebonize finials in wood turning. Though QLD Maple ebonizes very well with the traditional ebonizing solution.Mobyturns
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