Comtemplating the 2.35:1 screen...

**Sonnie** · **01-30-09, 10:46 AM**

I found this TruBlack flok, but I really need something wider for the top and bottom borders.

**Mark Techer** · **01-30-09, 10:57 AM**

Another way to work out the height of the projected image for zooming is to times it by 0.75 - EG 1080 x 0.75 = 810 which is how many lines you use out of the available 1080. This also works with the screen height...

As for masking, there are several adheisive flockings around, but many are not really black. The stuff I have access to is black and a light sponge

Mark

**hddummy** · **01-30-09, 11:05 AM**

Black velvet material is supposed to absorb light really well.

**Prof.** · **01-30-09, 05:13 PM**

Fidelio Velvet is recognized as the blackest velvet on the Planet..

**Sonnie** · **01-30-09, 05:46 PM**

It seems like I remember reading where regular velvet has something in it that doesn't absorb light as good as the velvet type material specifically made for absorbing light, but I can't seem to find it at the moment.

**Mark Techer** · **01-30-09, 09:50 PM**

Some black velvets just look purple or dark grey when compared to the black stuff I use now...

Mark

**Sonnie** · **01-31-09, 12:48 AM**

Well are you just going to keep us in suspense about this magical stuff you are using...

... is it a secret...

... you got a patent on it yet ...

Go ahead and fess up...

**Mark Techer** · **01-31-09, 03:08 AM**

Hehe, good to know that I have your attention

No I don't have a patent on it, but yes I am lining my new lenses with it because of its ability to soak up stray light. It is also the same stuf used on Oz Theatre's Majestic Scope Screens like the one I have...

Mark

**Sonnie** · **01-31-09, 08:39 AM**

Well it looks like the Fidelio velvet is the most popular... and reflects zero light, even with a camera flash, so I am not sure how it can get much better than that. The downside appears to be price at $25 per yard. Of course, spending $100 or so for a good screen border is chump change in comparison to the entire theater room.

**Mark Techer** · **01-31-09, 09:38 PM**

Thats it

Mark

**Sonnie** · **01-31-09, 09:45 PM**

Can spray adhesive be used on it to apply it to the wall... or is it too porous and thin? After all, you did mention spongy. I was thinking about maybe doing the entire front wall in it... maybe over some 705 or similar.

**Mark Techer** · **01-31-09, 10:08 PM**

Umm, the stuff I have is self adhesive like the "contact" that you cover books in, except that it is flocking, not plastic...but the same deal, peel away the backing and then stick it on the clean surface.

I did use spray adhesive for foam tiles though, but found that double sided tape worked better there too...

Mark

**Sonnie** · **01-31-09, 11:43 PM**

Where in the USA might one find this stuff that you use? Does it have a specific name?

**Mark Techer** · **02-01-09, 12:36 AM**

I don't know given that I am in Australia...

Mark

**Rodny Alvarez** · **02-01-09, 11:31 AM**

Is this the same thing?

last one on the page

http://www.mcmaster.com/#88015k1/=ex202

**Prof.** · **02-01-09, 06:07 PM**

Quote:

Sonnie wrote:

Where in the USA might one find this stuff that you use? Does it have a specific name?

In Australia you can buy 3" wide self-adhesive rolls of the flock tape from ebay..
You might find the same thing over there..

**Sonnie** · **02-01-09, 07:26 PM**

I am going to need something wider than 3" for covering the front wall.

I might order some of the Fidelio velvet and some of that self sticking velvet that Rodny posted a link to, and see how they compare.

**Prof.** · **02-01-09, 09:49 PM**

I think we're talking about three different things here..

For the screen borders, you will need to have them covered with Fidelio velvet or the flock adhesive tape,.,.

If you are planning to cover the front wall around the perimeter of the screen, then you don't need to use the Fidelio velvet..
Any good black velvet or velveteen will be fine...There won't be any light spill on that area..

If you're looking at a screen wall, with speakers mounted behind it, then you will need to use something like GOM or an open weave material..

**Sonnie** · **02-01-09, 10:44 PM**

No speakers behind anything.

Do they make Fidelio velvet in 3" widths with the adhesive backing?

**Prof.** · **02-01-09, 10:53 PM**

Not that I'm aware of..
I believe Joannes have..or used to have Fideliio velvet..They should be able to tell you if it's available in stick-on rolls..

**Sonnie** · **02-01-09, 11:14 PM**

Do most people generally staple it to the frame?

**Prof.** · **02-02-09, 05:39 PM**

Some people staple it on, others just glue it on..
I think a combination of both is the easiest and most effective way of covering your borders..

Just spray on glue to the timber borders and bond your pre-cut strips of velvet to the face and edges..and then staple it down on the back..

**Sonnie** · **02-02-09, 05:58 PM**

OK... so as far as you know the velvet material is not too porous for spray adhesive to leak through... providing it is not caked on like molasses.

**Prof.** · **02-02-09, 06:08 PM**

The spray adhesive only puts on a thin coat, and the velvet cloth is a closed weave, so there won't be any problem with the velvet becoming saturated..

**Sonnie** · **02-02-09, 06:29 PM**

Sounds like a plan... thanks for all the info.

Advertisement