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Projection Screens - what colour

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Daniel

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Jul 6, 2002, 8:47:42 PM7/6/02
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Please un-confuse me.....

What colour should a (front) projection screen be? I know that painting
the wall white is not going to bring out the best in my projector because of
the reflectivity of the surface. So....

When seeing the previous posts here and pics of 'home made' screens, black
surfaces are the done thing, but commercial screens for projectors are
white.

Please help

Thanks


Gary Lightfoot

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Jul 6, 2002, 9:20:23 PM7/6/02
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"Daniel" <dro...@hotmail.com> wrote in message
news:hbMV8.2137$SF2.1...@newsfep1-win.server.ntli.net

> What colour should a (front) projection screen be? I know that
> painting the wall white is not going to bring out the best in my
> projector because of the reflectivity of the surface. So....

Generaly they should be white, but if you use a bulb projector
(LCD/DLP) you can get benefits from a light grey screen. The grey
helps to improve black level in bulb projectors, and also improve
contrast. It depends on the light output from the pj and any ambient
light in the room.

> When seeing the previous posts here and pics of 'home made'
> screens, black surfaces are the done thing, but commercial screens
> for projectors are white.

I've never seen a black screen for a projector before... sure you're
not seeing the black bars of a 2.35:1 movie on a 16:9 screen?

Gary.

--
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www.g.lightfoot.btinternet.co.uk


Seahorse

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Jul 7, 2002, 2:26:41 AM7/7/02
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The Moon was full on Sun, 7 Jul 2002 01:47:42 +0100, the when the rotting corpse
of "Daniel" <dro...@hotmail.com> rose from the grave, broke into the Church and
typed this drivel on the Vicar's PC very slowly with one rotting finger :

No such thing as a black projection screen, they are normally white, there are
grey ones aimed at improving black levels and finally there are translucent ones
for rear projection (though I have never seen them used in a home set-up, as you
need a room behind the screen for projector).

As to the type of paint here is your starter for 10...

http://www.avsforum.com/avs-vb/showthread.php?s=&threadid=149991&highlight=paint+screen
http://www.avsforum.com/avs-vb/showthread.php?s=&threadid=148776&highlight=paint+screen
http://www.avsforum.com/avs-vb/showthread.php?s=&threadid=148692&highlight=paint+screen
http://www.avsforum.com/avs-vb/showthread.php?s=&threadid=146484&highlight=paint+screen

Oh, if you are going to paint a screen then you might just ditch the B&Q idea and
get some of this:

http://www.goosystems.com/

---------
Rgds Mike
Remove ZZZ to reply
What we demand is a total absence of solid facts!
- Vroomfondel
http://www.Seagrave.Org
Experts@home, just like you...

ViNNY

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Jul 7, 2002, 9:44:30 AM7/7/02
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"Daniel" <dro...@hotmail.com> wrote in message
news:hbMV8.2137$SF2.1...@newsfep1-win.server.ntli.net...

> Please un-confuse me.....
>
> What colour should a (front) projection screen be? I know that painting
> the wall white is not going to bring out the best in my projector because
of
> the reflectivity of the surface. So....

You *want* it to be reflective! That's how projection works.

> When seeing the previous posts here and pics of 'home made' screens, black
> surfaces are the done thing, but commercial screens for projectors are
> white.

A black screen won't reflect any light from the projector though!

You want white. Absolutely tonally neutral - the slightest tinge in any
direction (red, blue, etc) will throw your colour balance way off. Matte
white, or a very light grey, is the best way to go. A gloss paint will
reflect plenty of light, but might be too bright.

The most important thing, though, is background light. The darkest you can
ever get the screen is the colour that white paint looks in projection
conditions - ie with windows blocked off and all lights turned off.

-Vin


Tom Giddings

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Jul 9, 2002, 10:58:55 AM7/9/02
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White, definitely, and preferably using proper material

You can get a 1.8m by 1.8m screen for £99, quite good it is too.

Tom


"Daniel" <dro...@hotmail.com> wrote in message
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Pat Robertson

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Jul 9, 2002, 11:36:22 AM7/9/02
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"ViNNY" <a.vi...@NOSPAMclara.co.uk> wrote in message news:<102604947...@doris.uk.clara.net>...

Dont use gloss paint - it will just reflect like a mirror so you see
the light source reflected on the wall (if you know what I mean).
better to use a matt paint.

Pat

Stu

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Jul 9, 2002, 11:41:05 AM7/9/02
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>> -Vin
>
> Dont use gloss paint - it will just reflect like a mirror so you see
> the light source reflected on the wall (if you know what I mean).
> better to use a matt paint.
>
> Pat

Isn't it cheaper (and easier) just to build the frame and cover it in that
slightly-off-white "blackout" curtains (Silly really cos they're anything
but black). Very thick though.

I bought a huge one for my son's room last week for a little under 20 quid
and I'm led to believe it's the same stuff. Rather than reflect, it actually
"sucks" in the light.

Stu


Gary Lightfoot

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Jul 9, 2002, 12:52:27 PM7/9/02
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"Stu" <newsgroup...@bigfoot.com> wrote in message
news:agf05n$l7hr1$1...@ID-140193.news.dfncis.de

> Isn't it cheaper (and easier) just to build the frame and cover it
> in that slightly-off-white "blackout" curtains (Silly really cos
> they're anything but black). Very thick though.

That's what I did, and it cost me £28 all in for a 7ft wide 16:9
screen. Works very well I have to say. :O)

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