I agree i think it would take awhile for it to corrode and if it did, you would just have to redo it, every so often you have to replace your bulb, just another one of those things, but by all means i think it would work great im very interested to see some results if anybody ever gets back to australia and tries it lol
here are some links, wow this stuffs used in paint, wow way to go lol
http://www.applegate.co.uk/engineering/company/co_31181.htm
http://www.schlenk.de/pigmente/eng/aluflakes.ihtml
http://www.ccohs.ca/oshanswers/chemicals/chem_profiles/aluminum_powder/basic_alu.html
thats all for now but u get the idea hey and no home made bombs either this stuff blows
Trev
http://www.applegate.co.uk/engineering/company/co_31181.htm
http://www.schlenk.de/pigmente/eng/aluflakes.ihtml
http://www.ccohs.ca/oshanswers/chemicals/chem_profiles/aluminum_powder/basic_alu.html
thats all for now but u get the idea hey and no home made bombs either this stuff blows
Trev
Free
lol yeah maybe just a quick cut back every so often might do the trick, car wax i dont think would be good but it sure as hell would make the alloy shiny lol, actually maybe a wet sand with somthing like 2000+ grit sand paper would be enough to keep it flat and to exspose the alloy from the paint.
Trev
lol yeah maybe just a quick cut back every so often might do the trick, car wax i dont think would be good but it sure as hell would make the alloy shiny lol, actually maybe a wet sand with somthing like 2000+ grit sand paper would be enough to keep it flat and to exspose the alloy from the paint.
Trev
well let me chime in I have a dalite 2.5 gain( I believe I forget) glass beaded screen and Im un-impressed, sure its brighter( when your directly in front of the screen) otherwise its kinda misty and not the best Im thinking Im gonna get a reg mat white one and do a comparison honestly this is just used with My good ol standbuy panel and 250 HQI Overhead projector But I dont see how this is better then when I was projecting on a mat white window shade. just my thoughts😕 😀
I know these are made for reflecting because that is what our county buys them for. They put them on different surfaces to make them reflective.
What did you mean by this? This is one of the few pictures that actually turned out..so meh. I'm using a digital camera with no brightness settings or anything. That's a whole room behind there filled with lights, and the screen is in between the two rooms in a large doorway type opening.
Let me put it this way-Before, in Halo, I couldn't see in the shadows one bit. My friends could hide in there and snipe without me seeing at all. Now, you can easily see them. An improvement? Heck yeah.
And about the price...a pound of this stuff is about half of a foldgers coffee can. That's more than enough to experiment with on different surfaces. I just don't have the time or the energy (mono) to do that right now. I think these could help us greatly, if applied in the right way. Unless the guy offers in bulk (I didn't know where to contact him over the weekend) 10 dollars a pound is the best I can do.
What did you mean by this? This is one of the few pictures that actually turned out..so meh. I'm using a digital camera with no brightness settings or anything. That's a whole room behind there filled with lights, and the screen is in between the two rooms in a large doorway type opening.
Let me put it this way-Before, in Halo, I couldn't see in the shadows one bit. My friends could hide in there and snipe without me seeing at all. Now, you can easily see them. An improvement? Heck yeah.
And about the price...a pound of this stuff is about half of a foldgers coffee can. That's more than enough to experiment with on different surfaces. I just don't have the time or the energy (mono) to do that right now. I think these could help us greatly, if applied in the right way. Unless the guy offers in bulk (I didn't know where to contact him over the weekend) 10 dollars a pound is the best I can do.
Reflectivity is not the issue. Any glass bead is going to be reflective to some degree. The issue is whether or not they're any different than bead blasting glassbeads since they cost at least 10 times more per pound.
Video Freak's post is very interesting. It really makes me think that glassbeads probably aren't the way to go.
Here are the links I found during the day today:
Here's the important part from this link: "These beads are ordinarily used as the reflective element in paint used for highway signs. They are also used for bead blasting of machined parts."
So in other words, they are the same.
Military Beads
Here's a link on grit/micron size: http://www.unc.edu/~rowlett/units/scales/grit.html
The other links I found are basically the same.
The Eastwood beads are 70-100 grit which makes them 122 - 203 microns in size. The Dalite website says they use 9 micron beads!
"The surface of High Power™ is comprised of a huge number of tiny glass beads distributed evenly across a white vinyl field. In constructing this surface Da-Lite has found a way to get the diameter of the average bead reduced to about 9 microns. This is better than a conventional glass beaded screen by a factor of 7 since their typical bead diameter is about 65µ."
But as I said in an earlier post, we're still talking about very tiny particles.
I think the other information I found today is possibly the best way to go. I've got a sample of the product coming and if it's any good, I'll let everyone know. For now, I'm staying away from glassbeaded screens.
Ah, good news here. The guy does offer a discount..if I buy a 50 pound bag. I should be able to offer it for 5 dollars a pound now, maybe a little bit more to compensate for shipping.
Well, I got the samples that I mentioned in an earlier post.
Unfortunately they're about 4" x 2", so they're not very helpful.
This is the stuff I was talking about: http://www.dickblick.com/zz272/12/products.asp?param=0&ig_id=2797
I did a search for it on these forums and the avs forums and only found 2 posts mentioning it and no posts at all here, so I assume it's a new idea.
Here's the main site: http://cms.3m.com/cms/US/en/2-135/ciikFFL/view.jhtml
The material I have is only 1 type of a variety of available forms that you can get this stuff in. There may be something better.
Anyway, this stuff has billions of little glass bubbles on it that are supposed to reflect light. It's the same stuff they use in reflective paint on the sides of roads or on signs.
The road paint might be the best possible solution for our needs.
The problem with the samples that I have is that they have a shiny surface - besides the glass bubbles - so that as you move around the room, the image on the sample gets brighter and darker and if you're in the right position, there's glare from the glossy surface. Maybe it could be covered with a flat or semi-flat clear coat and still work, but I haven't tried that.
Here's a page with some very interesting pics. Shows you just how reflective this stuff is: http://laser.physics.sunysb.edu/~wise/wise187/janfeb2002/reports/kristin/draft.html
Unfortunately they're about 4" x 2", so they're not very helpful.
This is the stuff I was talking about: http://www.dickblick.com/zz272/12/products.asp?param=0&ig_id=2797
I did a search for it on these forums and the avs forums and only found 2 posts mentioning it and no posts at all here, so I assume it's a new idea.
Here's the main site: http://cms.3m.com/cms/US/en/2-135/ciikFFL/view.jhtml
The material I have is only 1 type of a variety of available forms that you can get this stuff in. There may be something better.
Anyway, this stuff has billions of little glass bubbles on it that are supposed to reflect light. It's the same stuff they use in reflective paint on the sides of roads or on signs.
The road paint might be the best possible solution for our needs.
The problem with the samples that I have is that they have a shiny surface - besides the glass bubbles - so that as you move around the room, the image on the sample gets brighter and darker and if you're in the right position, there's glare from the glossy surface. Maybe it could be covered with a flat or semi-flat clear coat and still work, but I haven't tried that.
Here's a page with some very interesting pics. Shows you just how reflective this stuff is: http://laser.physics.sunysb.edu/~wise/wise187/janfeb2002/reports/kristin/draft.html
No. Only on the stuff I got the samples of. $15 per 12" x 24". Not cheap I guess.
I'm looking for prices on the paint. And like I said, there's a lot of other forms to get this stuff in. There's fabric too. The samples I have are pretty thick sign material. Almost like thick reflective tape. I assume a thinner fabric for clothing would cost less - and probably be more suitable for our needs.
I'm looking for prices on the paint. And like I said, there's a lot of other forms to get this stuff in. There's fabric too. The samples I have are pretty thick sign material. Almost like thick reflective tape. I assume a thinner fabric for clothing would cost less - and probably be more suitable for our needs.
Jtb
yeah somthing with like a fine knitted fabric with that stuff in it or on it, ive been thinking about screens latley and i think most of our light loss is the light passing through the material, have u ever had a look at the back of a screen? its a vision on the other side too that shouldnt be there, (im talking diy stuff here) the only light should come from the screen is from the front, so im wondering if we painted another sheet behind our projection screen black or a reflective coating to reflect the image fully forward, (well to help it, the black wouldnt) maybe it would also help our black levels.
Trev
yeah somthing with like a fine knitted fabric with that stuff in it or on it, ive been thinking about screens latley and i think most of our light loss is the light passing through the material, have u ever had a look at the back of a screen? its a vision on the other side too that shouldnt be there, (im talking diy stuff here) the only light should come from the screen is from the front, so im wondering if we painted another sheet behind our projection screen black or a reflective coating to reflect the image fully forward, (well to help it, the black wouldnt) maybe it would also help our black levels.
Trev
The stuff I have now hanging on my wall is solid. It's not really very heavy either. Mine is 1/8" thick (I think, I don't think I used 1/4"), and I lifted the approx. 5 foot by 4 foot piece onto the wall and held it myself while I screwed it in. I've been calling it fiberboard, but it's really not. It's what you use to do upholstery work. Upholstery board? I bought it to do the interior on a car I was building and I had some left over. It's got a pretty smooth, flat surface and it should take just about any kind of paint you'd want to put on it.
The other possibility, if a perfectly flat surface is really needed, is plexiglass (at least for something up to 4' x 8'). Paint both sides, maybe paint the back flat black and the front with the reflective paint and there you go! I guess top grade plywood could work too.
Look at this: http://products3.3m.com/catalog/us/...ontrol_3_0/command_AbcPageHandler/output_html
The other possibility, if a perfectly flat surface is really needed, is plexiglass (at least for something up to 4' x 8'). Paint both sides, maybe paint the back flat black and the front with the reflective paint and there you go! I guess top grade plywood could work too.
Look at this: http://products3.3m.com/catalog/us/...ontrol_3_0/command_AbcPageHandler/output_html
screen goo
I just saw an interesting demonstration of these screen paints:
www.goosystems.com
It is a little pricey, but interesting to consider.
I just saw an interesting demonstration of these screen paints:
www.goosystems.com
It is a little pricey, but interesting to consider.
Ace3000,
I wonder if that fine white fish aquarium sand would make a good screen. You could make it like sir_vival did by sprinkling a fine layer over a thick wet coat of white paint.
I think that the glass beads that are specifically made for adding reflection to paint are more round in shape. I don't know if the blast media is made to the same standards but it may be the same stuff.
Hezz
I wonder if that fine white fish aquarium sand would make a good screen. You could make it like sir_vival did by sprinkling a fine layer over a thick wet coat of white paint.
I think that the glass beads that are specifically made for adding reflection to paint are more round in shape. I don't know if the blast media is made to the same standards but it may be the same stuff.
Hezz
Hezz
im not sure buddy but ill try somthing with silica sand as soon as i get back to aust, we have the most pure silicon sand in the world right on our beaches just north of perth and its fine like dust, but what ill do is wash it and ill grind it to make it into like a power and maybe mix it into some flatt white paint then give it a very slight cut back to expose the sand through the paint. Ill also be working on a motorised screen soon too so if this works then i can get onto making the motorised screen that will be auto up and down when i turn the projector on and off via the remote.
Trev
im not sure buddy but ill try somthing with silica sand as soon as i get back to aust, we have the most pure silicon sand in the world right on our beaches just north of perth and its fine like dust, but what ill do is wash it and ill grind it to make it into like a power and maybe mix it into some flatt white paint then give it a very slight cut back to expose the sand through the paint. Ill also be working on a motorised screen soon too so if this works then i can get onto making the motorised screen that will be auto up and down when i turn the projector on and off via the remote.
Trev
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