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Made blackout screen, please advise re increasing gain

post #1 of 4
Thread Starter 
I have only skimmed some threads here but it is a huge forum. Using (mostly) the directions on Engadget, I built a nice screen : http://www.engadget.com/2006/08/29/h...jector-screen/

I am quite happy with the way the screen turned out. I used the shiny side of the blackout cloth as I thought it looked 'whiter'. However, with my Samsung H710AE, I have to wonder if I need a higher gain material. I don't know what the gain number is for the blackout, so I can't speak in specifics here, maybe someone can help out with that too.

I'd like to retain the frame that I have, as the size, weight and portability work fine for me. I cannot go much heavier than this as the screen will need to be moved occasionally due to a pair of closets in the wall behind the screen.

Will using Behr Silverscreen on the cloth make an improvement? Some sort of coating is the way I'd prefer to go as my kids and I spent a fair bit of time stapling and gluing the blackout cloth, then attaching a felt border, etc.
post #2 of 4
EDIT : doh, nevermind, i'm stupid

From what i've read, a coating will definitely help. I put Behr Ultra White on mine, and it was a definite improvement. But my projector is a CRT, not an LCD, so you may need a different color.
post #3 of 4
Silverscreen will make it less bright. I would look at the thead titled S-I-L-V-E-R
post #4 of 4
Quote:
Originally Posted by KCK7 View Post

I have only skimmed some threads here but it is a huge forum. Using (mostly) the directions on Engadget, I built a nice screen : http://www.engadget.com/2006/08/29/h...jector-screen/

Hmmmmm......, why does that pictorial approach look familiar?

Quote:


I am quite happy with the way the screen turned out. I used the shiny side of the blackout cloth as I thought it looked 'whiter'. However, with my Samsung H710AE, I have to wonder if I need a higher gain material. I don't know what the gain number is for the blackout, so I can't speak in specifics here, maybe someone can help out with that too.

It's just under 1.0 , shiny side. The sheen can produce pinpoint hot spotting, but beyond that you've got a rapid drop off.

That is comparatively speaking when judged against something else. Many adjudge BOC as being very acceptable in quality without a coating. But I'm sure there are Legions of "Painted BOC Screen owners who will swear oaths to the need to improve it's potential.

What we have here is a already stretched piece of BOC on a frame. For that 700 lumen PJ, I'd say either S-I-L-V-E-R HG or Silver Fire HG. The former being the absolute highest gain of the two, and the latter having the advantage of the deepest Blacks.

Either would suit your purpose, but if Ambient Light isn't an issue, and the prospect of prepping the screen with 3 duster coatings of Kilz2, then applying 7-8 coats of S-I-L-V-E-R over that, then you can achieve something on the order of a "Doubling" of your off screen brightness.

Quote:


I'd like to retain the frame that I have, as the size, weight and portability work fine for me. I cannot go much heavier than this as the screen will need to be moved occasionally due to a pair of closets in the wall behind the screen.

Well your Ok there. If the BOC is blemish free and taunt, I cannot see any reason to fool around with something others would still be considering building.

Quote:


Will using Behr Silverscreen on the cloth make an improvement? Some sort of coating is the way I'd prefer to go as my kids and I spent a fair bit of time stapling and gluing the blackout cloth, then attaching a felt border, etc.

Of course, the Felt Boarder will have to be removed. If your Boarder overlaps the actual Frame, and goes inward to format your image, than thats cool because you want to over run your screen area on each pass one direction or the other.

I'm I ahead of myself / you?

You will have to seriously consider that spray painting the BOC surface is the only assured way of your getting the best results no matter what paint scheme you choose.
Rolling has been done by many.....even Brushing onto Canvas has been successfully done. But in many ways, what was acceptable 2-3 years ago, even 1 year ago....can be considered inadaquate.

Your needs demand Gain, and Picture Quality. It would be nice if the screen paint you chose, and the finish you achieved, prepared the way for the eventual HD-PJ upgrade. Would it not?

I feel your real decision lies upon "Modest Ambient or No Lights". Any ambient with S-I-L-V-E-R will detract from the Blacks. The rest of the image says put, but the Blacks will "GRAY OUT" proportionately to the amount of ambient light overwhelming the screen's surface.

Silver Fire HG delivers stunning Blacks and brilliant colors in a Dark Room, and still provides dominant black levels in normal ambient light.

The only other thing that can be said is the the Silver Fire HG screen takes less time to spray (3-4 coats vs 7-8 coats) Both will require Kilz2 primed surface, because both depend upon the "Flat Brilliant White" underneath to enhance gain.
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