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velvet paper for flocking

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#1 rob1986

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Posted 23 January 2022 - 12:59 PM

https://www.amazon.c...42960642&sr=8-4

 

this good?


Edited by rob1986, 23 January 2022 - 01:00 PM.

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#2 Frugal Astronomer

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Posted 23 January 2022 - 01:15 PM

I think it would accomplish the purpose of absorbing light, but I wouldn't be so confident about it possibly shedding onto my mirror.  I've only used flocking material from ScopeStuff, as it's not supposed to shed.  It is pricier, though.


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#3 Couder

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Posted 23 January 2022 - 01:48 PM

you have to think about condensation, too. That product might disintegrate if the dew gets heavy - and it does.



#4 astrohamp

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Posted 23 January 2022 - 01:52 PM

Look into Protostar and check out this link.



#5 careysub

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Posted 23 January 2022 - 09:34 PM

You can also search for "black velvet car wrap" on eBay. I will wager that a black velvet they are applying to the outside of cars can withstand moisture and not shed.


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#6 luxo II

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Posted 23 January 2022 - 10:34 PM

black velvet they are applying to the outside of cars...

is only "architectural grade", still has hairs, and it sheds.

 

Still worth a try though.



#7 TayM57

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Posted 23 January 2022 - 11:31 PM

I have the protostar flocking in my 10". It doesn't make a lick of difference in the views, so set your expectations accordingly would be my advice. The protostar flocking is to stop stray light from my neighbor's porch light from getting into the drawtube and causing ghosting/reflections.

 

It won't improve your views.



#8 rob1986

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Posted 23 January 2022 - 11:46 PM

in my particular case I'm having major reflection problems with the powerseeker 80 cell. After resetting the cell on the tube the SA seems to have gone away, I'm getting nice sharp stars and snap to focus even with a UWA 4.7mm (193x, the limits of a 80mm lens)

 

jupiter is still washed out, and sirius is still showing heavy diffraction artifacts. I seem to have traced them to the cell's high gloss and the screws just aft of it. they don't seem to change depending on place in the field of view or EP choice. they are consistent with all bright point objects.

 

I got the idea from parallax who says that they use velvet.



#9 tommm

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Posted 24 January 2022 - 12:56 PM

You might peruse this thread. Some recommend Joanns Fabric and Crafts Black Velvet.



#10 MitchAlsup

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Posted 24 January 2022 - 02:53 PM

You might peruse this thread. Some recommend Joanns Fabric and Crafts Black Velvet.

I had good luck with "triple black velvet" I ordered from Amazon.

 

This is not flocking paper, but simply velvet fabric. You spray the back side with contact cement, you spray the part to be blackened with contact cement, and you are really careful placing the velvet on the tube. You can do things with fabric that you cannot do with paper....


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#11 careysub

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Posted 24 January 2022 - 04:55 PM

Premium black velvet is my go-to flocking material. Various names for it: Fidelio, triple velvet, plush darling, etc. 



#12 Pinbout

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Posted 24 January 2022 - 07:33 PM

I like the small sheets cause I only place them across from the focuser and cown around the primary... not the entire tube.



#13 largelenses

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Posted 24 January 2022 - 07:37 PM

There are some paints out there now that make things look like a black hole. Would be great for the inside of a scope.



#14 brentelgeuse

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Posted 24 January 2022 - 08:02 PM

I glued velvet fabric with 3M Super 77 spray adhesive because it's repositionable. I have very little confidence in my ability to place the fabric accurately on the first try. 



#15 Pinbout

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Posted 24 January 2022 - 09:19 PM

There are some paints out there now that make things look like a black hole. Would be great for the inside of a scope.

https://youtu.be/5JCPw9jvqhg

 

and they have black 3.0



#16 careysub

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Posted 25 January 2022 - 01:14 PM

https://youtu.be/5JCPw9jvqhg

 

and they have black 3.0

But do searches to check out comments about the use of Semple's blacks (read all relevant comments on these threads):

 

https://www.cloudyni.../#entry11235422

 

https://www.cloudyni.../#entry11539639

 

They appear to be somewhat delicate to apply and use, and have durability problems.


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#17 Pinbout

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Posted 25 January 2022 - 04:51 PM

But do searches to check out comments about the use of Semple's blacks (read all relevant comments on these threads):

 

https://www.cloudyni.../#entry11235422

 

https://www.cloudyni.../#entry11539639

 

They appear to be somewhat delicate to apply and use, and have durability problems.

I have it, don’t need to do searching tongue2.gif is that like doing your own research? 

It’s not delicate to apply. How durable does it need to be opposite the focuser? lol.gif



#18 calypsob

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Posted 26 January 2022 - 03:29 PM

Black velvet tape for theatre walls works pretty good in tubes, its alot easier to control than a big sheet imo

#19 SandyHouTex

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Posted 27 January 2022 - 04:20 PM

Here is what Land, Sea, and Sky (Takahashiamerica) uses:

 

https://www.thorlabs...partnumber=BFP1


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#20 epee

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Posted 27 January 2022 - 06:33 PM

That is adhesive fabric and will stretch, flop about, and stick to itself while you try to apply it.

What you want is paper-backed adhesive felt.

#21 rob1986

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Posted 30 January 2022 - 12:22 AM

Any specific recommendations for a flocking test run? I'd thought of some felt with double-sided Scotch Tape (the yellow-labeled sort)

 

I'd be more amenable to getting Protostar if I could fully verify my hypothesis.

 

and bear in mind that I plan to extend the flocking immediately aft of the cell a couple of inches to cover the screws.



#22 epee

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Posted 31 January 2022 - 04:19 PM

I've found that adhesive felt from local craft stores are the best to purchase; you can see if they have a paper backing or not, before you buy. The paper backing means that the felt will keep the shape and dimensions that you cut it to; without deforming as you press it down. Paper backed felt is stiff enough that you can test the fit without removing the backing to expose the adhesive.

 

Remember when you flock the rear of your tube, to allow an unflocked area for the primary cell to insert. 


Edited by epee, 31 January 2022 - 04:23 PM.


#23 rob1986

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Posted 01 February 2022 - 10:38 AM

just a reminder: i'm flocking a refractor lens cell and the dew shield, not a newt.



#24 brentelgeuse

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Posted 01 February 2022 - 12:24 PM

just a reminder: i'm flocking a refractor lens cell and the dew shield, not a newt.

I just put a dew shield on my 50mm finder. I painted the inside with black acrylic paint but, surrounded by streetlights, I still get nasty glare, worse than without the shield. I'm going to try flocking the dew shield (really a glare shield for me) to see if it's better. 



#25 epee

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Posted 02 February 2022 - 04:51 PM

just a reminder: i'm flocking a refractor lens cell and the dew shield, not a newt.

In that case stretchy might be better; t would depend on the contour of your dew shield.




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