Flat black

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Carbon60
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Flat black

Post by Carbon60 » Sun Apr 08, 2018 9:34 am

For anyone looking for a flat black paint, you might want to take a look at this one:

https://culturehustle.com/products/blac ... t-material

Not as good as Vanta black, but given that no one can purchase Vanta black (a novel nano carbon black material) it comes in as a respectable second. I used this when I refurbished my 150/Lunt 35 mod. Nothing beats having correctly positioned light baffles to prevent stray light, but augmenting this with a good flat black can only help.

I primed and painted using my usual grey primer and matte black top coat and then finished off with a couple of brushed coats of this product.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
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More images at http://www.flickr.com/photos/solarcarbon60/

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yltansg
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Re: Flat black

Post by yltansg » Sun Apr 08, 2018 12:32 pm

Thanks Stu for sharing. It will come in handy for me one day :)

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marktownley
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Re: Flat black

Post by marktownley » Sun Apr 08, 2018 12:54 pm

Useful to know, thanks Stu.
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bart1805
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Re: Flat black

Post by bart1805 » Sun Apr 08, 2018 9:02 pm

Or this one:
http://www.astrogeraete.de/Antireflexfarbe.html
Use it myself and works great.

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eroel
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Re: Flat black

Post by eroel » Sun Apr 08, 2018 11:03 pm

Stu:
Thanks for the tip.
Regards,
Eric.


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Carbon60
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Re: Flat black

Post by Carbon60 » Sat Apr 14, 2018 6:34 am

A pleasure, guys.

Thanks for the alternative, Bart. Good to know.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

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Bob Yoesle
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Re: Flat black

Post by Bob Yoesle » Sat Apr 14, 2018 1:10 pm

Hi Stu,

Looked the Black 2.0 up here in the States on Amazon, however, it gets quite a few mediocre reviews:

https://www.amazon.com/BLACK-2-0-mattes ... B0758GKKGZ

The Berger Astrogerate Bart suggested is a bit more expensive. It's available from Telescope Express in Germany in 250 and 750 ml, but shipping to the States is expensive (33 Euros):

https://www.teleskop-express.de/shop/pr ... 50-ml.html

Also available from Astrolumina:

https://www.astrolumina.de/specials/ant ... xfarbe.php

A lot of folks in the US seem to like Krylon Ultra Falt Black:

https://www.cloudynights.com/topic/5649 ... ack-paint/

Looks like a heads-up comparison test between the three would be desirable...
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Carbon60
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Re: Flat black

Post by Carbon60 » Sun Apr 15, 2018 12:43 pm

Thanks for the suggestions, Bob. I do have access to a reflectometer at work, so maybe this is I project to be undertaken at some point. I did find Black 2 to be pretty good with normally incident light and less good at oblique angles, so my thoughts here were more about reducing those stray reflections that bounce around that we can sometimes see. Light baffles will always be the most effective way of eliminating oblique angle reflections, of course......no light, no reflections. ;)

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

bart1805
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Re: Flat black

Post by bart1805 » Sun Apr 15, 2018 2:21 pm

Hi Stu,
Let me know if you start this project. I could send you a sample of the German Berger paint. Bart.

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Bob Yoesle
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Re: Flat black

Post by Bob Yoesle » Sun Apr 15, 2018 4:08 pm

Here's a link to the Krylon Ultra Flat Black on USA Amazon - don't know about European sources:

https://www.amazon.com/Ultra-Flat-Black ... B0064OW9DW

Not too expensive...
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Bob Yoesle
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Re: Flat black

Post by Bob Yoesle » Tue Apr 17, 2018 4:10 pm

I have received word that the Berger Astrogate anti-reflection paint cannot be shipped to the USA from either of the two sources above :-(
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bart1805
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Re: Flat black

Post by bart1805 » Tue Apr 17, 2018 4:47 pm

Why not Bob? I could order a can and ship it from the Netherlands. Bart.

Bruce Girrell
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Re: Flat black

Post by Bruce Girrell » Wed Apr 18, 2018 5:23 pm

Ordered some. I have some microscope gear that could use it

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Bob Yoesle
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Re: Flat black

Post by Bob Yoesle » Wed Apr 18, 2018 6:02 pm

Hi Bart,

Thank you very much for your offer.

Apparently the paint contains materials deemed hazardous for international shipping: "Attention !!! Can not be shipped by air due to security restrictions!"
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