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Noob question about screens


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#1 sgtbiker

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Posted 12 January 2017 - 01:30 AM

I have been reading all about making proy and everything I have read said to start with making my own BP. So I ordered my Chema from sky lighter and I have one question can I use aluminum window screen to mix my Chems with without blowing my self up

#2 OldMarine

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Posted 12 January 2017 - 07:04 AM

Oxidizers will eat up the aluminum in a short time. If you can't make or purchase stainless screens I'd use a stainless kitchen strainer. Try and find one between 20 and 40 mesh.
Come on! Name one other hobby in which you cheer as your money and hard work go up in smoke!

#3 Mumbles

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Posted 12 January 2017 - 01:07 PM

If you're trying to make hot or fast black powder, the commercial airfloat charcoal that Skylighter sells will probably not do the trick.  Just a common issue many people tend to have when starting out.  

 

I will admit, I never had an issue with my aluminum screens though they didn't get much use.  You do need to be diligent about washing them after use though.  Stainless is ideal.  Industrial supply houses like McMaster-Carr and Grainger tend to be good sources at pretty good prices for the screen material itself.  Normal kitchen sieves are usually 12-16 mesh.  The fine screens are 30ish if I recall correctly.  Splatter screens can also be a good source for a tighter mesh.  Both have their uses.


Just so you guys quit asking, here is the link to the old forum. http://www.xsorbit2....forum/index.cgi

The sky is my canvas, and I have 2,113 pounds of powdered paint in the workshop.

#4 sgtbiker

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Posted 12 January 2017 - 05:50 PM

Thanks guys I have picked up a few different mesh sizes at Walmart. Ok another question what would be the most common size mesh screens would I need to start out with? I plan on just starting out building simple fountains with some color and crackle added

#5 lloyd

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Posted 12 January 2017 - 06:01 PM

Sarge,

4,8,10,20,30,40, and maybe 60.

 

That'll get you through almost anything you really need screens for.  Eventually, you'll want 4,12, and maybe one seldom-used 100-mesh.

 

Lloyd



#6 sgtbiker

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Posted 12 January 2017 - 06:07 PM

Thanks Lloyd guess I'll hit up McMaster Carr when I get back to work

#7 OldMarine

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Posted 12 January 2017 - 08:26 PM

Caleb sells the bucket screens which are danged handy. I use mine for classifying BP since you can stack them on a bucket and do it all in one fell swoop.


Come on! Name one other hobby in which you cheer as your money and hard work go up in smoke!

#8 Carbon796

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Posted 12 January 2017 - 10:27 PM

I have 3,6,12,30 and 60. 3 mesh is used for granulating BP & Polverone. The 6 & 12 for grading it. -3 + 6 is coarse powder, -6 +12 is medium powder, -12 is fines. 30 mesh is what I use to screen mix all of my comps. And the 60 mesh pretty much never gets used.

You don't necessarily need to get/have every screen listed by everyone right away. You can build up your collection, as you have a need for them.

#9 dynomike1

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Posted 13 January 2017 - 04:35 PM

I have a 4, 20, 40 and i mainly use the 4 and 20. All i make is BP and stars.


There are very few problems that cant be solved with explosives.

                             Explosives are a bang up job.


#10 Mumbles

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Posted 13 January 2017 - 05:38 PM

I had a similar set to what Carbon796 described, plus a 16 mesh.  I used it in my grading process.  The one thing I liked my 60 mesh for was screening colored comps.  It gets rid of coarse bits of parlon and red gum, which otherwise I find distracting in stars.  

 

Get what you think you'll need, and you can always expand later.


Just so you guys quit asking, here is the link to the old forum. http://www.xsorbit2....forum/index.cgi

The sky is my canvas, and I have 2,113 pounds of powdered paint in the workshop.

#11 OldMarine

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Posted 13 January 2017 - 06:09 PM

I'll admit I went overboard on screens but in my defense MC had a special! I have 3&4 mesh welded screens for star cutting, 4,6,8,10, 20, 30 ,60, 80 and 100 in 12x12 framed screens. I got all last year for under $80 but of course I had to frame them. I have the green bucket screens in addition that I got a good deal on from a fellow pyro. I figured I'd never use the 80 and 100 mesh ones but they are very handy for screening charcoal and phenolic resin.

I also bought a complete set of star sizing screens though I don't have a star roller yet. Starting to think I'm a screen whore in addition to other vices ie; string, paper,fuse and MgAl!


Come on! Name one other hobby in which you cheer as your money and hard work go up in smoke!

#12 gregh

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Posted 13 January 2017 - 08:49 PM

Yeah Patrick, I remember you beating me to the punch on those sizing screens! That was a good deal.

#13 OldMarine

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Posted 13 January 2017 - 08:57 PM

Yeah Patrick, I remember you beating me to the punch on those sizing screens! That was a good deal.

Yeah, I'd priced some of them beforehand and now it's kicked me in the butt to try my hand at building a roller and making some stars!


Come on! Name one other hobby in which you cheer as your money and hard work go up in smoke!




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