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post #1 of 27 Old 10-26-2013, 07:04 AM - Thread Starter
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Hi

first post here, I need to paint a surface of 120 squared meters for projection, I need to find some cheap paint  as the best finish possible for a very very cheap price. It s not for watching movies but a 3d mapping projection, so I don t really need any super high quality stuff, just something that will be as bright as possible. 

Any advice will be welcome, consider that I live in Spain and the availability of material is limited in my area.

 

Simone

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post #2 of 27 Old 10-26-2013, 08:27 AM
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Where are you getting a projector capable of lighting up 120 SQ METERS? The typical Home theater screen 120" Diag 16:9 screen is just a tad sort of 4 Sq Meters.. What is the length and width of this screen? Did you typo that size?

Doug

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post #3 of 27 Old 10-26-2013, 08:45 AM - Thread Starter
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Hi

hopefully I am not in the wrong section, please redirect me to the right one in case, I am writing here because I think here I can find people who are DIYing their own screens.

Yes it is 120 squared meters, and on a curved surface, I am using 4x Canon LV7585, rotated of 90 degrees for a total of 3000x750 pixels resolution. The screen size is about 21x6 meters, not any common ratio as, as I ve mentioned, it is not intended for cinema.

 

http://www.canon.co.uk/For_Home/Product_Finder/Multimedia_Projectors/lv/LV-7585/

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post #4 of 27 Old 10-26-2013, 11:40 AM
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Whitewash? http://en.wikipedia.org/wiki/Whitewash


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(Just as big an idea thief as)

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post #5 of 27 Old 10-26-2013, 12:47 PM
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Perhaps Screen Goo? There are European distributors although I don't see Spain on the list directly.

http://www.goosystemsglobal.com/indexb73f.html?cont=home


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post #6 of 27 Old 10-26-2013, 02:46 PM - Thread Starter
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mm whitewash? is that any good for projection?

 

goo is way too expensive for my project thanks

 

if I buy just some cheap paint at the local store, is there a specific color I should ask for?

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post #7 of 27 Old 10-26-2013, 03:44 PM
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Quote:
Originally Posted by iolab View Post

if I buy just some cheap paint at the local store, is there a specific color I should ask for?

"White". biggrin.gif

(check the DIY Screens forum here, you'll find a wealth of posts from folks doing painted screens, you'll probably find the answer there without asking...)


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post #8 of 27 Old 10-26-2013, 04:06 PM - Thread Starter
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Hi

first of all, this is not about a home cinema screen and we are not going to watch movies on it.

This is about a projection mapping onto a curved wall build with over 700 plastic cans.

I am using 4x Canon 7585 at 6500 lumens each for a total of about 3000x750 pixel resolution (considering the soft edge blending).

We have already painted the wall spraying a few layers of common acrylic matte white paint but I am not satisfied with the resulting color, as white seems yellowish and colors are generally washed.

I d like to give it some enhancement but, guess what, I can t afford to buy projection paint for 120 sq. meters, I d need to find something at the local store.

Any idea, hint, advice is welcome.

 

Simone

 

(I wrongly started a thread here http://www.avsforum.com/t/1496586/120-squared-meters-screen-need-some-cheap-paint)

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post #9 of 27 Old 10-26-2013, 04:08 PM - Thread Starter
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Ok THAT is the right section, thanks a lot, new thread is here

 

http://www.avsforum.com/t/1496643/120-squared-meters-screen

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post #10 of 27 Old 10-27-2013, 05:58 AM
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iolab,

Hey...I believe I have at lest two solutions for you. Either is certainly is going to be better than White paint alone, and both ridiculously less than GOO. but it will probably cost approx. $250.00 USD for the paint, alone. Minimally. Goo would be well over $1000.00+

Being that you are in Spain, we'll have to work together to source some few components, and anything that is wholly unavailable in the EU I can probably arrange to have shipped affordable to you via USPS.
However I suppose time might be a factor for you, so relate any specific limitations, as well as what you deem to be your maximum budget, as well as to if the paint could be sprayed on in sections, or if rolling is the only option.

lastly, what is the minimum viewing distance? While most high gain, high contrast DIY Paint applications need spraying to avoid the reflective particles from being too apparent, if lumen output is widely dispersed and lower per sq. meter than average, often that is far less an issue.

You obviously need some boosting in the dynamics of the resolved colors as well as some assi9st in Black levels, so we must get you to a point where you surface will have at bare minimum 1.2 gain and be a slight silver/gray in shade.

PM me you specific location (incl. Postal Code ) so I can explore your local / EU availability options.

Sorry for the protracted delay in my response, I've been up in a Attic most of the previous 48 hours, laying out and labeling Fiber Optic Cables. The rest of the times in between I spend flat out recouping. redface.gif

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post #11 of 27 Old 10-27-2013, 06:18 AM - Thread Starter
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Hi

postal code here is 38009, I live in an island off the African coast but it is spanish territory, we are a "port franc" that means no VAT applied but we have to pay our own local import tax. Shipping from the US may not be an option as I need that within a week (so here my bad to get to this so late)

 

Only option is spraying, we have a compressor and the spray gun.

 

The budget you indicate would be ok I guess.

 

The public will be at about 5 to 20 meters away, the subject mostly vectorial, 3D real time images, we ll have to project some video from time to time but let s forget about that.

 

Thanks for your help.

 

S.

 

EDIT:  at the end of this video you can see the screen in action

https://vimeo.com/68776434

 

EDIT2: as I am using 4x projectors and the lamps on each are not properly timed (some are brigther) fine tuning the color balance may be a real pita but we ll deal with that later on

 

EDIT3: this is a 3D representation of the screen and projectors position

http://imgur.com/a/zW1mo#0

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post #12 of 27 Old 10-27-2013, 08:11 AM - Thread Starter
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Ooops with 3D I just meant 3D graphics not 3D stereoscopic or such, it s just plain projection

 

EDIT: you are the secodn person advicing something similar, I got this before adviced

 

http://www.dulux.co.uk/colour/grey_steel_1

 

Unforntunately it seems like Dulux is not sold in Spain..

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post #13 of 27 Old 10-27-2013, 08:16 AM
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Is the 3D via Filters / Active Glasses or is it Passive?

The metallic components (Silver & Pearl) you'd need are the issue. You might have some local sources, but that time frame is a buzz kill
If I had everything assembled and re4ady to ship on Monday You'd have about a 5-6 day maximum shiptime, allowing for your Customs inspection.

But I don't see it being possible in under 7 "Week Days", soo instead you have some shopping to do.

Do you have access to Dulux "Light & Space" Ultimate White "Matte"?


BTW, that is a very cool setup. It might be best to not rush, and a well done re-do will result in absolutely a optimal improvement.

At best under your time frame, Dulux L&S Matte tinted a light Gray may be your best "Gotta have it yesterday" choice....but if you just apply the Dulux first for the deadline, it would look better than what you already have...and present you with a optimal surface for another coating of a better application once time is on your side.

Oh....no Passive / Active 3D...that makes me wipe some sweat off my brow.


I still suggest taking a careful approach because with your application, presentation looks to be everything.

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post #14 of 27 Old 10-27-2013, 08:50 AM - Thread Starter
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I don t know what happen cause my answer coms before your question... anyway to make this clear : it is not any kind of 3D/steroscopic projection, it is a normal plain projection, what I meant with 3D is that the images are created in real time with a DirectX rendering engine, so once again 3D is not an issue / specification of the projection.

 

Looking at the local stores for example the damn Leroy Merlin I can access teh following brands

 

Titanlux

 

Bruguers

 

Luxens

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post #15 of 27 Old 10-27-2013, 09:08 AM
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Quote:
Originally Posted by iolab View Post

I don t know what happen cause my answer coms before your question...

I was doing a edit of my post and hit delete inadvertently, so I had to re-post it from another window. When i did so I saw your new post and responded accordingly.
Quote:
....anyway to make this clear : it is not any kind of 3D/steroscopic projection, it is a normal plain projection, what I meant with 3D is that the images are created in real time with a DirectX rendering engine, so once again 3D is not an issue / specification of the projection.

I got that......
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Looking at the local stores for example the damn Leroy Merlin I can access teh following brands

Titanlux

Bruguers

Luxens

Hmmmm....I will do so checking. But you can also check to see if any of those brands have what is called "Lumitec Technology". If so, your in luck...and choosing Bright white matte would put you ahead of the game.

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post #16 of 27 Old 10-27-2013, 09:15 AM - Thread Starter
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post #17 of 27 Old 10-27-2013, 09:24 AM
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Luxens Brilliant White Interior looks good

Bruguers should be checked into as well.

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post #18 of 27 Old 10-27-2013, 09:35 AM - Thread Starter
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Basically I see 2 main category for paints:

 

- plastic (seems cheaper)

 

- acrylic

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post #19 of 27 Old 10-27-2013, 10:52 AM - Thread Starter
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Let me ask this, there have been 2 kind of references:

 

- do it light grey matte  (better color reference and contrast?)

 

-  do it brilliant white (maximum brigthness?)

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post #20 of 27 Old 10-27-2013, 06:11 PM
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Quote:
Originally Posted by iolab View Post

Basically I see 2 main category for paints:

- plastic (seems cheaper)

- acrylic

You absolutely want to use Acrylic

Quote:
Originally Posted by iolab View Post

Let me ask this, there have been 2 kind of references:

- do it light grey matte  (better color reference and contrast?)

That would be a "Do it once and go with it..." route.
Quote:
-  do it brilliant white (maximum brightness?)

A good, bright white that does not push blue or green can be better for starters, and le4ave youy wiuth a really decent base on which to paint a more advanced coating later.

I cannot give you much more to go on because the mentioned Websites don't jive well with my Translator program.

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post #21 of 27 Old 10-28-2013, 02:22 AM - Thread Starter
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Hi

so far I ve been to Leroy Merlin and they have the Bruguer Lumitec white paint available :

 

http://www.leroymerlin.es/leroyMerlinWebsite/productos/pintura/pintura_interior/blanca_paredes_y_techos/fichaVariante.html?idCat=41801

 

this seems te be water based paint.

 

I ve also been to a paint shop where they specialize in the Juno brand and they ve sent an inquiry to their lab and will call me back in a few hours.

 

http://www.juno.es/ing/decoracion_interiores.aspx

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post #22 of 27 Old 10-28-2013, 07:12 AM - Thread Starter
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I took some picture so you can see the quality of the actual paint, it is a water based plastic paint, matte white. I am not sure we can paint acrylic on top of that.

 

http://imgur.com/SBhBesD,VmyXLEd,LTI1IPL,9gyOlkI,QKmPIXN,2nbFD0a,q9Dizpc#3

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post #23 of 27 Old 10-28-2013, 11:45 AM
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Originally Posted by iolab View Post

I took some picture so you can see the quality of the actual paint, it is a water based plastic paint, matte white. I am not sure we can paint acrylic on top of that.

Certainly you can....we paint over Plastic / PVC surfaces a majority of times.

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post #24 of 27 Old 10-28-2013, 12:23 PM - Thread Starter
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Ok, would you mind try to resume where we are at? ;)

 

- if I get a Lumitec based paint will that do or is it only for priming ?

 

- so far the only Lumitec paint I ve found is for interior/walls so it is not acrylic

 

- if the final paint must be light grey, how much grey should that be?

 

- can i use the actual paint present on my screen as primer ?

 

tx

Simone

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post #25 of 27 Old 10-28-2013, 12:43 PM
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Originally Posted by iolab View Post

Ok, would you mind try to resume where we are at? wink.gif

Well...alright......I suppose so. wink.gif
Quote:
- if I get a Lumitec based paint will that do or is it only for priming ?

It'll do fine for painting.
Quote:
- so far the only Lumitec paint I've found is for interior/walls so it is not acrylic

That seems strange as most acrylics are in fact Latex Water-Based, and designed specifically for Interior use.
Quote:
- if the final paint must be light grey, how much grey should that be?

A light Gray. Ask the technician if he knows what a "Neutral Gray" is. Not knowing what method is used in your local for mixing tints, it's probably something you should refer to a local tech to determine. In any case, you only want enough of a Gray hue to improve Contrast and deepen color saturation, but no so deep a Gray as that it brings the designed in reflectivity enhancement in a Lumitec down to "basic Flat Latex" levels
Quote:
- can i use the actual paint present on my screen as primer ?

Absolutely, but very lightly sand the surface beforehand using a medium grit sanding Block to improve adherence and assure a smooth application.
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tx
Simone

My pleasure....now go get'ter dun!

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post #26 of 27 Old 10-28-2013, 01:52 PM - Thread Starter
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So, resume it all up:

 

- first use Lumitec based brilliant white

 

- then paint over a light grey matte, I suppose this one as to be a thin layer otherwise the previous layer would be useless (?)

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post #27 of 27 Old 10-28-2013, 04:51 PM
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Quote:
Originally Posted by iolab View Post

So, resume it all up:

- first use Lumitec based brilliant white

- then paint over a light grey matte, I suppose this one as to be a thin layer otherwise the previous layer would be useless (?)

Yes...but the Gray matte should be derived via a Gray tint added also to the Lumitec BW, and since your spraying, only enough is applied to effect a even, "all one color" coat. No more...no less.

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