Blackest Black?

Frankenscope? Let's see it!***be advised that NOTHING in this forum has been safety tested and you are reading and using these posts at your own peril. blah, blah, blah... dont mess around with your eyesight when it comes to solar astronomy. Use appropriate filtration at all times...
Post Reply
User avatar
Carbon60
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 14209
Joined: Wed Mar 07, 2012 12:33 pm
Location: Lancashire, UK
Has thanked: 8418 times
Been thanked: 8163 times

Blackest Black?

Post by Carbon60 »

Anyone would think I’m obsessed with finding the blackest practical commercial black paint...I’m not, but I do like to see the latest tech on this, having tried Black 2 and the ‘blackier’ Black 3. Now there’s a new kid on the block; Musou Black, from Japan.

https://nerdist.com/article/musou-blackest-paint-japan/

If you’ve ever built a solar Frankenscope, then you’ll understand the interest in removing any and all spurious reflections of stray light. This is something I battled with in early trials with my 150mm mod and others. Baffles and black paint solved the problems, but I was hooked on finding a commercial ‘better black’.

I’d be interested to know if anyone has tried this already. BTW it is expensive at around £45/100ml and availability might be tight at the moment.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
User avatar
marktownley
Librarian
Librarian
Posts: 42272
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Has thanked: 20440 times
Been thanked: 10246 times
Contact:

Re: Blackest Black?

Post by marktownley »

Interesting Stu! I should explore my scopes for 'shiny surfaces' while we are in winter and not really able to do much observing. Winter tinkering ;)


Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
hk160
Oh, I get it now!
Oh, I get it now!
Posts: 35
Joined: Sun Nov 22, 2020 1:18 pm
Been thanked: 48 times

Re: Blackest Black?

Post by hk160 »

Thank you for the pointer!

I have used Black 2.0 and 3.0 as well as the discontinued Berger black (https://www.astrogeraete.de/Antireflexfarbe.html) for my Coronagraph. I will try out the Musou Black - the blacker the better ;)

I have also created my own nano-tubes in the past (sort of): in order to get my Lyot stop perfectly black, I "sooted" it, i.e. I held it over a candle trying to create lots of smoke/soot, which is very black. This is only suitable for small parts which don't burn ... and then there is the problem of particles coming loose, even though I did not have any real problems with that.


Post Reply