what would be a good adhesive to use for bonding canvas to sintra? - AVS Forum
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post #1 of 11 Old 04-23-2012, 10:33 AM - Thread Starter
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I'm going to make a 5x8' curved screen, so it will have to flex some. I will also be bonding the sintra to a wood frame on the back. I've used the DAP green(non-flamable) for some test panels and they seem ok thus far, but they are small.
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post #2 of 11 Old 04-23-2012, 03:29 PM
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Not at all sure why you want to cover the Sintra since in and of itself it provides an excellent, smooth surface to use to paint on any number of Painted Screen solutions.

And virtually any/ all of them will perform better than the Canvass alone could hope to.

To quote James T. Kirk;
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post #3 of 11 Old 04-23-2012, 04:31 PM - Thread Starter
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Going to roll paint on it. Canvas is much more forgiving. Any errors would show greatly on the smooth surface I am afraid. Is this not the case? Do you have experience using it in this fashion? How does it handle dings? I have years of experience with canvas but not with foamboard.
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post #4 of 11 Old 04-24-2012, 08:47 AM
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Quote:
Originally Posted by CaptJosh View Post

Going to roll paint on it. Canvas is much more forgiving. Any errors would show greatly on the smooth surface I am afraid. Is this not the case? Do you have experience using it in this fashion? How does it handle dings? I have years of experience with canvas but not with foamboard.


That is not the case...for most. If you've painted onto canvass with a roller before with some...or good success, then your in the minority, and pretty fortunate as well. many would be envious of your experience, I'm sure.

I would think that with such experience, rolling a smooth surface like the Sintra would be child's play for you. Using a 3/8" roller and proper technique, you should be able to bang out a smooth, blemish free surface easily.

BTW, I noticed your posting for advice elsewhere as well. I also noticed you received the same advice...that you should forgo the use of the canvas.
But be advised that the pant that was suggested to you is well known for leaving Roller Marks, and it is a paint that creates a surface of less that 1.0 gain as well.

What you have not mentioned so far is what PJ your using...and why you want to create a curved surface. Nor is their any indication as to your viewing circumstances, room conditions, wall / surface colors and their proximity to the screen's location.

All of which go far in determining as to which /what type of paint and color /gain surface you'll want to consider. Don't jump into any decision given that does not also include coverage of those considerations.

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post #5 of 11 Old 04-24-2012, 12:59 PM - Thread Starter
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I think I will forego the canvas. 17 years in the fine arts field made it a comfortable choice.

The PJ is an acer 7531D, light controlled room, 106" dalite matte white being used right now.
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post #6 of 11 Old 04-24-2012, 01:37 PM - Thread Starter
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I have had good results using flow aid to reduce the roller marks(on canvas) sintra seems.more likely to have issues.
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post #7 of 11 Old 04-24-2012, 03:40 PM
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CaptJosh;

i have a degree in fine arts / graphics myself... unless you are going with a screen larger then sintra can provide... then forego the canvas.
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post #8 of 11 Old 04-24-2012, 04:27 PM - Thread Starter
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Nice. That will save a lot of labor. Can you comment on the durability of sintra?
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post #9 of 11 Old 04-25-2012, 08:36 AM
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Quote:
Originally Posted by CaptJosh View Post

Nice. That will save a lot of labor. Can you comment on the durability of sintra?

I will.

It is exceedingly durable.

BTW, your PJ is a pretty capable one, and I see no concerns about you using any Gray Paint solution...even a sub-1.0 type.

However, I should like to point out that the mix your considering can show a bit of graininess. Most Paints that contain any degree of reflective elements in them will to some degree or such. Rolling such mixes can...and usually does accentuate that effect. And when your viewing high resolution images with lighter backgrounds...especially during panning scenes, it can become quite apparent.

Plainly stated, with that projector and it's excellent DLP-oriented Contrast specifications, you'd be better off simply using a basic Neutral Gray (N8) since you are rolling.

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post #10 of 11 Old 04-25-2012, 12:53 PM - Thread Starter
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Excellent. Thank you for your info. I'm still messing with the paint options at this point. I have a panel I did with Golden Acrylics N8, and it is quite nice. I'm still questioning if metallic component of any sort is needed.
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post #11 of 11 Old 04-25-2012, 03:27 PM
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Quote:
Originally Posted by CaptJosh View Post

Excellent. Thank you for your info. I'm still messing with the paint options at this point. I have a panel I did with Golden Acrylics N8, and it is quite nice. I'm still questioning if metallic component of any sort is needed.

Personally speaking from experience, the correct use of metallic content almost always lends a noticeable improvement....if the end result is one that exhibits a positive gain without undue artifacts (speckles &/or sparklies)

But having a high contrast, high lumen beamer of a PJ can render the need for metallics moot under many circumstances and situations.

You should still consider that any paint containing metallic content will always suffer more potential for issues if rolled instead of sprayed. So if metalic content is chosen....you should be spraying.

The balance between gain and the depth of Gray of the surface can mean a vibrant image with a perceived boost on contrast...or a duller image with crushed whites and blase colors. The great equalizer is the PJ's own potential to drive past any roadblocks a Gray surface sets into place, or one having the need to forgo Gray...and ambient light viewing potential because gain is all important to compensate for a decided lack of lumen output.

You have light control
Your screen isn't all that large.
You have a high resolution PJ w/DLP rendered Contrast.

(I still am trying to determine why you need a curved screen...especially if the aspect ratio doesn't translate into being 2.35:1)

In my honest opinion, a N8 Neutral Gray is your Huckleberry, especially if you stick to your guns about rolling.

Be advised the general consensus on this Forum is that a simple neutral Gray properly applied usually does the best job of providing a "Open Window" effect. That is to say that under use, you forget there is even a screen in use.

To quote James T. Kirk;
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