Projecting image on black painted wall - AVS Forum
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post #1 of 6 Old 12-09-2013, 07:17 PM - Thread Starter
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Hi Guys

I was wondering what you guys think about projecting image onto a black wall. I have a optoma gt750 projector. Currently i'm projecting on white painted wall. I was thinking about painting it black, I've read that you get sharper, brighter picture on black paint. Just want some recommendation. I'm going this route because i think it will be cheap, don't have any budget to get a screen right now. Thanks everyone

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post #2 of 6 Old 12-09-2013, 08:08 PM
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You were told wrongly. Some dark Gray advanced DIY paints that contain a preponderance of Metallic particles and that acheive the shade of dark Gray via RGBY suspended elements do provide splendid images...but ain't a one of 'em actually "Black".

Yes, it's true that you can produce a very watchable image on a Black Surface, but the amount of lumens required is disproportionate to the size of image you can obtain.

If you shot a 82" diagonal image (16:9 @ 40" x 71") you'd get 68 foot lamberts....on a 1.0 gain surface.

But on a Black surface...something akin to a 0.1 gain surface....... about 2 foot lamberts....if that.

The smallest image the 750 can manage is 57" diagonal (28" x 50" @ 3' Throw) and at 0.7 gain you'd get 97 fls

With 0.1 gain...maybe about 4 fls at the uttermost. That would be fortunate.

Still, you can try what you want...but if you were wise, you'd haul up short and instead settle for a ultra dark Neutral Gray.....a image size as small as you can accept, and a Throw distance that optimizes your lumen output.

To quote James T. Kirk;
"I'm laughing at the superior intellect"

http://www.invisiblestereo.com
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post #3 of 6 Old 12-09-2013, 08:12 PM - Thread Starter
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Thanks man I appreciate the advice, I know so little about this stuff and trying to get the best picture for cheapest price lol. I will look into getting the gray neutral paint. 

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post #4 of 6 Old 12-09-2013, 08:15 PM - Thread Starter
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any particular paint brand do you think is best to pickup at retail stores

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post #5 of 6 Old 12-09-2013, 08:19 PM
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Sherwin Williams
"Gray Matters"
SW 7066

Ask for "Duration" Flat Base

SW paints ain't the Cheapest around....but hey....when you going dark gray, you need some quality in the constitution of the paint more than you do with a Flat White.
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To quote James T. Kirk;
"I'm laughing at the superior intellect"

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post #6 of 6 Old 12-09-2013, 08:23 PM - Thread Starter
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Thanks man. I'll paint the wall that color that i'm going to projecting the image on and hopefully picture will be much better on that than me projecting it on a white wall

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