8mm Forum: Screen paint & surface?

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Posted by James N. Savage 3 (Member # 83) on November 11, 2006, 06:00 PM:

Please forgive me for this, I know its been asked before, but I couldn't find it in the forum back files.

I am getting ready to build a scope screen using white paint on a smooth surface. My question is-

What is the best surface for a (moveable) screen. And does is have to be pre-treated before being painted (i.e. primer, etc.).

Also, what is the best paint to use.

Thanks.

Nick.

Posted by Graham Ritchie (Member # 559) on November 11, 2006, 08:54 PM:

Hi Nick
For something light that can be moved a sheet of hardboard might do. Nick how do you intend to attach it to the wall so it can be removed? and how big are you planning to make it? For painting I would use a fine roller to apply a few coats of a water based white sealer/undercoat, giving a very light sand between coats.

Finally with the roller build up at least 3 coats of a good quality Vivid white matt water based paint. Once all this has dried and with masking tape work out your black border and apply a few coats of a black matt school board paint or equivalent, and there you have it, a cheap screen that will do the job nicely.
I understand in the US there is a screen paint you can use I did inquire about it out here but it was a bit expensive .One good thing about a painted surface is you can always give it a few more coats in the future if the needs it. Look forward to here how you get on.

Graham. [Smile]

Posted by James N. Savage 3 (Member # 83) on November 14, 2006, 06:19 AM:

Thanks Graham!

The screen will be between 9 and 10 feet wide (cinemascope). I will probably hang it with hooks at the top. I'll try to get started right after the holidays.

Nick.

Posted by Brad Miller (Member # 2) on November 15, 2006, 12:18 AM:

Nothing, absolutely nothing beats a 5x12 sheet of white formica kitchen countertop. Glue it to a wooden frame built out of 2x4s and tape off the edges with black gaffer's tape for masking. The resulting image is phenomenal and the reflectivity is amazing and can be viewed even at extreme angles.

Nobody ever believes me when I tell them about formica, but just trust me. You will NOT be disappointed.

It's really cheap too!

Posted by Winbert Hutahaean (Member # 58) on November 15, 2006, 12:37 AM:

Brad,

Isn't that formica a kind of glossy thing?

So, wouldn't the light from projector also be seen on the screen then?

thanks,

Posted by Graham Ritchie (Member # 559) on November 16, 2006, 03:10 PM:

Nick
Just a thought it might pay to brace your screen if you do use a thin sheet, with strips of wood e.g 2 inches wide and about half inch thick over your 10ft length as a backing, you could glue them with PVA wood glue "great stuff", and simply lie your sheet with something, heavy old books etc on a flat floor with your bracing wood underneath while the PVA goes off.
A generous black border e.g 3 or more inches really makes a difference to the picture quality and most importantly it has to be matt black no gloss at all. Nick I hope you dont mind my ramblings and whatever choice of screen material you use a 10ft Scope screen will look really good.

Years ago a friend built his own Curved Scope screen and what he did was to run a string line tied to the bottom of the GS to the wall and holding the string tight moved in a arc from his centre line giving him the measurements from the wall "clever stuff". The end result was impressive, the screen really looked good The amazing thing about this subject is the inventive ideas people can come up with.
Graham [Smile]

[ November 16, 2006, 10:21 PM: Message edited by: Graham Ritchie ]

Posted by Timothy Ramzyk (Member # 718) on December 01, 2006, 10:35 PM:

Does anyone have experience with Screen-GOO? I'd like to try it on hardboard, right now I use a huge scope ratio canvas primed with white acrylic gesso and stretched, then covered with a super-opaque flat white Naz-Dar screen ink.

Posted by Brad Miller (Member # 2) on December 03, 2006, 04:09 AM:

Winbert, you would think it would be a problem, but I assure you it is not. A formica screen has essentially no hot spotting issues and a much wider viewing angle than most screens provide.

Posted by Timothy Ramzyk (Member # 718) on December 04, 2006, 11:48 PM:

quote:
Winbert, you would think it would be a problem, but I assure you it is not. A formica screen has essentially no hot spotting issues and a much wider viewing angle than most screens provide.

I went to the local Home Depot, no formica, and the clerk said when they used to have it, it came in a role. That didn't sound right, I was expecting 4' x 8' sheets or something?

Posted by Graham Ritchie (Member # 559) on December 06, 2006, 12:48 PM:

Hi Timothy
I think this is what you are looking for, pretty sure this is what Brad is referring to. The photo is a left over from a 8ft by 4ft sheet about 20mm thick used for bench tops, shelfing etc. This sheet is refered to here as Melteca which I think is just another name for Formica. A full sheet like this is very heavy are you looking at a permanent set up?

Posted by Roger Manning Jr (Member # 321) on December 06, 2006, 01:12 PM:

Yes Formica is great for screens, Thats what I have a 5'x8' on a frame I built out of 1/2" plywood with a curve "sorry Brad I know you don't like curved screens" Looks great for 16mm and video projection.
And yes Formica does come rolled up it's about a 1/16" thick, But Home Depot and the other homes store is not a good place to get it, Your better off getting it from a cabinet supply or cabinet shop. I own a millworks shop and I can get a 5'x8' for around $36.
I'll do my best to get some pics of my screening room up soon "I know Dan wants to see it"

Posted by Chip Gelmini (Member # 44) on December 06, 2006, 02:47 PM:

Well............I was surprised to read about formica. Seems like it would work but not for me. I have a true theater screen with speakers behind it. I have had great results with standard flat latex white paint. It was carefully rolled on with the screen hanging. For masking, I attached strips of 1/4" plywood strips that were painted flat black first and then attached to the screen. The screen is threaded and stretched using rubber bands on screws installed to the frame through the grommets on the screen edges. If I were to rehang this screen, I would scrap the rubber bands and use giant extra long standard tie-wraps for a tighter stretch. The rubber bands have been holding for 3 years now, and none have broken yet due to the elements of the basement.

CG

Posted by Timothy Ramzyk (Member # 718) on December 16, 2006, 02:06 AM:

Thanks for the formica info! Has anyone projected film and video on one? I'm set up for both.

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