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Screen mixing with metal in the mix


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#1 Uarbor

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Posted 24 July 2022 - 07:23 PM

I am making stars with magnalium included. I have read a bunch of threads that said don't put metal through your screens. But I'm using a 40 mesh and my metal is 200 to 325 mesh. I can't imagine metal getting stuck in a 40 mesh at that size. Just figured I would touch base before I go ahead and do it. Previous to this I have been screen mixing with a frying spatter screen. The results were okay but some of my colored Stars had white spots in them when they burn. So I wanted to try to mix it better. Thanks in advance for any response.

#2 Carbon796

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Posted 25 July 2022 - 10:49 AM

Thats perfectly fine and is standard practice.

Not putting metals through your screens. Really only applies to course and hard metals. Like TI & FeTi.

Fyi the "standard recommended" mixing screen mesh, for incorporating comps. Is 20 mesh, though I generally preferred a 30 mesh. A 40 mesh, may take a significant amount of effort to work the comp through.

#3 Arthur

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Posted 25 July 2022 - 12:42 PM

I'd suggest that the material of the screen is important! Brass or stainless could be better than window screen.



#4 justvisiting

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Posted 25 July 2022 - 01:03 PM

I've always followed the advice not to put metal through screens, and my stars have come out fine. Magnalium is hard and gritty. I see the possibility of it sensitizing the mix. I mix it in after screening and feel 'a bit' safer for doing so. Everybody has their own perception of risk, and our perceptions often differ :)



#5 Uarbor

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Posted 25 July 2022 - 01:18 PM

I bought a piece of 40 mesh stainless and made my own frame from an old oak dresser drawer. I did screen it a few times through the frying spatter screen but I could still see white specks in the comp. So I just wanted to run it through a finer screen a couple times. I probably should have ran the individual chemicals through the 40 mesh first. But I never really needed to do it before except this time I purchased High Purity KP and it was kind of lumpy. I normally use KP with anti cake and it is as fine as silk. Also I did not want to get anything in the way of making the ultimate blue. It definitely made the blue comp more homogeneous it did not have any metal in it. Next comes red and it has metal which is the reason for my question in the first place.

Edited by Uarbor, 25 July 2022 - 01:22 PM.


#6 Arthur

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Posted 25 July 2022 - 01:52 PM

I made successful screen sets by using a set of plastic (PP I think) kitchen storage boxes. Push a mesh into the bottom with a soldering iron than melt the bottom off with the iron, leaving the mesh as the bottom of the container. 



#7 Uarbor

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Posted 25 July 2022 - 07:07 PM

I made successful screen sets by using a set of plastic (PP I think) kitchen storage boxes. Push a mesh into the bottom with a soldering iron than melt the bottom off with the iron, leaving the mesh as the bottom of the container. 

Nice

#8 Arthur

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Posted 26 July 2022 - 02:53 PM

https://www.abprospecting.com/node/643






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