Author Topic: Cant afford vantablack?  (Read 240 times)

specconcheckre

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Cant afford vantablack?
« on: January 03, 2018, 09:35:20 AM »
If you thought vanta black was unobtanably priced then check this out, black 2.0. I have not tried it yet but for the price I'm going to ordr a bottle. https://www.cultureh...st-art-material



plethenofin

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Re: Cant afford vantablack?
« Reply #1 on: January 08, 2018, 12:17:15 AM »
Vantablack is not just unobtainably priced....its just plain unobtainable to the general public.

Teflon Mayorga

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Re: Cant afford vantablack?
« Reply #2 on: January 09, 2018, 02:05:18 AM »
I ordered a bottle yesterday. Came to about $25 USD total. Hasn't shipped yet, and takes 5-8 days, I believe.

It is a thick paint substance. Acrylic. You can brush it on, maybe 2 coats, or dilute it with water and spray it on.

It's probably good for shiny areas in focusers, diagonals, eyepieces... or to paint a real black area across from your focuser in a Newt.

Probably have to dilute it and spray it on to do the tube of a scope. Any likely it would need 2 or 3 coats. I think he said a diluted bottle, 2:1 water to paint, would cover about 1.5 sq. meters, but don't hold me to that.

It dries in 2-3 hours as brushed on and can be recoated then. But to get completely as black and flat as possible takes about 48 hours.

Being an acrylic based substance, it shouldn't be exposed to the elements - IOW not for things left outside. How it will last for use in a scope or accessoried, I don't know.

I have some eyepieces and diagonals that could use a darker finish, so that's what I'll try it on. After painting the areas, it's probably good to leave it open to the air for 48 hours to outgas and cure fully.

If it is as dark as the gent says and lasts like a paint, it is worth a try, I figure.

Aoptimus Berhane

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Re: Cant afford vantablack?
« Reply #3 on: January 11, 2018, 06:40:59 AM »
Hey Joe,

Make sure to let us know how it goes. I'm very interested in using this in my scope and my imaging equipment.

It should help a lot with image contrast issues when taking subs from a very light polluted environment.

prehconbubun

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Re: Cant afford vantablack?
« Reply #4 on: January 12, 2018, 12:37:24 AM »
Cheap flat black spray paint and fine sawdust is just as good, and is probably better at nearer to grazing angles, the most insidious and relevant we have to deal with.

Tumbness Mendez

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Re: Cant afford vantablack?
« Reply #5 on: January 12, 2018, 01:05:40 AM »
Vanta Black is a very special coating!!!

After application, the surface cannot be touched by anything or
it's benifits will be gone!!!

Using nanotubes, it is mostly air...likely upwards of 90%

It is fine for applications that do not get touched or dirty, as
once dust settles on it...it would be very difficult to clean its
surface without ruining its properties and blackness!

Not likely a good application for most earth bound projects,
especially most ATM things, unless it is in an enclosed area
like the ID of a camera body.

Sorry...

Preston previously an advanced polymer chemist.

Jairo Zilinskas

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Re: Cant afford vantablack?
« Reply #6 on: January 12, 2018, 10:42:54 AM »
It cost way too much, anyway.

This stuff is an Acrylic paint that is said to be ultra flat black. It's called Black 2.0 and is made by and for artists who want to get the Vantablack effect, but can't get Vantablack as it is not offered to the public, is so expensive they won't say how much it is, and has the limitations you point out.

It isn't as flat black as Vantablack, of course, but has a similar effect for art use. So some on the CN site have ordered a bottle to check it out.

If not, it's flat black paint and sawdust.

When I get it, I'll do a test. It takes about 48 hours to completely cure and reach the flattest and blackest it is capable of.

I'll report, take some photos and check it at a low incidence angle against flat black paint. I'll have it next to flat black paint, flat black paint with sawdust, and flock paper, just to do it right.

Probably take a week and change to get here.Wasn't there a movie..."50 shades of flat black?" Anyway.

Cleo Wickware

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Re: Cant afford vantablack?
« Reply #7 on: January 13, 2018, 01:22:16 AM »
Joe,
Those results will be interesting indeed, and anxiously anticipated. Thanks for being a 'beta tester.'

pregdefciato

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Re: Cant afford vantablack?
« Reply #8 on: January 13, 2018, 01:28:42 PM »
Pity I don't still work in reflectance measurements.. I could have given the options a test. I tested candidate ceiling tiles and carpet for an optics lab once. Grazing reflections become more specular (as Glenn notes) and many black things (especially anodising) cease being black beyond the very deep red.
Vantablack is deposited, so you need he surface prep and the expensive coaster (and magic) recipe. I know some people who had samples, but as it's fragile and will shed nanocarbon I haven't asked for any little "off cuts". Painted blacks are still pretty good, 3m nextel being the old standard (not made anymore). Avian could help...  http://www.aviantech...ffuse_black.php Strategic baffling is probably as good as squeezing a tiny bit less reflectance from your paint, stop the light getting into a position where it's a problem that needs dealing with.
Cheers
PeterW

Rick Nocturnum

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Re: Cant afford vantablack?
« Reply #9 on: January 18, 2018, 03:32:07 AM »
That's interesting work, Peter. I'd imagine there are some surprises when measuring reflectance.

I was wondering yesterday if Vantablack gets dusty? It doesn't sound like the kind of material you can run the vacuum over! .

And I thought what a wonderful rendering of a black hole it would make with the Vantablack used for the hole surrounded by the bright radiation disk!

Good day, Peter.

Kunjan Blanco

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Re: Cant afford vantablack?
« Reply #10 on: January 22, 2018, 07:41:57 PM »
I plan to try this stuff in a refractor so I can remove the baffles. I am hoping dust is not an issue. I will test a few small surfaces first. I have a debayered 60d that is very sensitive to infrared so I will take some test images and load them up.

John Trujillo

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Re: Cant afford vantablack?
« Reply #11 on: January 23, 2018, 02:28:45 AM »
I don't think dust would be a problem inside a refractor, Wes, no more than any other paint of flock.

Mentioning dust, I was referring to Vantablack, which if it got dusty would be hard to clean because of the nanotubes. Probably dust on Vantablack could be blown off with forced air. I don't know.

ulatimhan

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Re: Cant afford vantablack?
« Reply #12 on: January 23, 2018, 01:45:48 PM »

sihealhdoggse

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Re: Cant afford vantablack?
« Reply #13 on: January 31, 2018, 10:46:11 AM »
Quote
Came across this...http://i.imgur.com/HpaUIie.gifv

That is only black because of the improper exposure by the camera/operator/post-processor.

skelevchasul

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Re: Cant afford vantablack?
« Reply #14 on: February 03, 2018, 06:33:04 AM »
Quote
and many black things (especially anodising) cease being black beyond the very deep red.
Yep, but I have found a company that has a anodizing recipe that is black into NIR, Pioneer Metal Finishing does it.