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Everything you always wanted to know about Screen Goo but
were afraid to ask. (By Ken Hotte, Goo Systems technician and head of research and development)  What is Screen Goo? Who uses it? Can I use it? Is it expensive? Which product for which projector? How much do I need? What Can I Put It On? Rolling Instructions. Spraying Instructions. Troubleshooting. Curing Times. Why Goo instead of typical wall paint? Why a Grey coating instead of white? My projector isn't listed on the calculator, now what?Spec Data Sheet  SATA spray gun settings - SATA of Germany, manufacturers of premium spray gun systems, have developed a _detailed list of optimized settings_ for the use of three of their guns for applying Screen Goo.
What is Screen Goo?
Goo Systems' Screen Goo products are specially formulated, color corrected, screen coatings in liquid form. They are designed to achieve the highest performance levels possible for a given display situation.  top
Who uses it?
Screen Goo products are being used by all levels of the video industry from do-it-yourself home theater aficionados to large scale commercial and industrial clients. top
Can I use it?
Designed for easy application via spraying or rolling, screen goo products can be successfully applied by the novice or professional alike. top
Is it expensive?
The cost of screen execution can be as little as the price of the coating itself - when applied to an available wall space. More dedicated videophiles can investigate the possibilities of elaborate framing systems and custom screen design. top
Which product for which projector?
A seemingly simple question to which, of course, there is no simple answer. We've recently introduced a Product Calculator section to our website. Filling in the requested data as accurately as possible will result in a recommendation of the products best suited to your projector and to your installation. top
How much do I need?
The Finish Coat and Reflective Coat work together; both are required to create a screen. Finish Coat and Reflective Coat coverage per sq. ft. can vary somewhat, depending on the surface conditions. 1 liter (just slightly more than a US Quart in volume) will typically cover approximately 50 sq. ft. with two thin coats, under ideal conditions on an ideal non-absorptive surface. Starting with a primed white surface is strongly recommended for peak performance. top
What Can I Put It On?
Recommended Substrates Front projection Screen Goo can be applied to any smooth paintable surface. Many materials other than the products listed below can be used successfully. For best results the surface should be flat and smooth. If this surface to be coated is not smooth, it should be sanded down and wiped off prior to applying the Screen Goo Reflective Coat. Porous surfaces such as drywall, gyproc, and wood based materials such as plywood, particle board, MDF, should be sealed with a flat, white latex primer prior to applying Screen Goo Reflective Coat. Colored surfaces should also be primed with a flat, white latex.  alusuisse-comp.com - Sintra is an excellent material to apply Screen Goo front projection coatings to. It is very hard and durable and requires no priming prior to being "Goo'ed". It is, however, somewhat floppy and should be supported to ensure a flat viewing surface. We suggest choosing white and a minimum 6mm thickness. North American customers can call 1-800-626-3365 to locate a nearby reseller.
alusuisse-comp.com - Gatorfoam is another excellent choice for "Goo'ing". It is light weight and rigid enough to be self-supporting. It is, however, prone to denting and should probably not be used in high traffic areas or to stop hockey pucks. No priming is required. We suggest choosing white and a minimum 1/2 inch thickness. North American customers can call 1-800-626-3365 to locate a nearby reseller.
dazian.com - 3 pass foam, sometimes called blackout cloth, is an excellent fabric substrate for a front projection Goo application. No priming or special preparation is required before "Goo'ing". This material can be used with a stretcher frame to make a lightweight, portable Goo Screen. It is sold by the yard and available in widths up to 110". Rolled Screen Goo applications are not recommended for blackout cloth. Spraying will give optimal results with this substrate.
top
We recommend mounting your projector in its permanent location before
determining the actual screen dimensions. Once the projector is mounted you
should project an image onto your surface and adjust for image geometry. The
width of the image at the top of the screen should be the
same as the width at the bottom and likewise the sides of the image
should have the same height. Finally you should check that the image is level
and square in the corners. Now you are ready to mask off the area you will be
coating with a high quality painters tape. If you intend to create a border
around your screen you should allow an extra inch around all sides so that the
coated surface will be slightly larger than your projected image The following before and after photos
show what you can expect a correctly applied wet surface to look like and the
uniformity of the same surface after it has dried. There's also a screen shot of
an image projected on that same surface.
Before Drying
After Drying
Screen Shot
Spraying Instructions:
Surface preparation: Please ensure that the surface to be coated is clean and grease-free. The smoother the surface the better finished product will be. Porous surfaces such as drywall, gyproc, and wood based materials such as plywood, particle board, MDF, should be sealed with a flat, white latex primer prior to applying Screen Goo Reflective Coat. Colored surfaces should also be primed with a flat, white latex. User preparation: Experienced spray painters will find Screen Goo quite easy to work with. If you've never used a paint sprayer before, please consider doing a rolled application instead. If you'd like this to be your first venture into paint spraying, may we suggest that you take the time to familiarize yourself with your equipment by experimenting with some less expensive coatings in inconspicuous areas, prior to attempting your Goo masterpiece! Suggested equipment: We recommend using an HVLP and/or pressurized cup spray system employing a gun with a 1.5-2mm tip diameter. The specific type of gun is less important than the user's familiarity with it. It is very important that none of the spray equipment be contaminated with solvent-based coatings or cleaning agents as these will ruin the water-based Screen Goo coatings. Reflective Coat: Screen Goo Reflective Coat should be thinned 5-10% by volume with filtered or distilled water prior to a sprayed application. If using a pressurized cup system, set the air/paint mixture in the following manner: Turn off the atomizing pressure. Set the paint tank pressure so that when the trigger is fully depressed the paint stream will travel about two feet. Set the atomizing pressure at a approximately 10X the PSI of the paint tank pressure or enough to completely atomize the coating. If there is no gauge for cup pressure, set the atomizing pressure to a maximum of 44 PSI. For other types of guns, follow the manufacturer's instructions for high solids, water-based coatings. Keep the gun at a constant 6" - 8" away from the project. Release the trigger at the end of each stroke. Then, depress the trigger and overlap the previous pass by about 1/3. Continue in this fashion for consistent coverage. When the surface is fully and evenly covered, let dry for 30-45 minutes and then repeat the procedure for the second and final coat of Reflective Coat. Finish Coat: Screen Goo Finish Coat will not require thinning. Follow the same procedure as for the Reflective Coat but allow 45-60 minutes drying time between the two coats of Finish Coat. top Troubleshooting
Faint vertical lines or streaks may be visible where your roller patterns overlap. These are not unusual and in almost all cases they will clear up on their own as the coating cures. If you can still see these lines 4-6 weeks after application, please contact us for assistance. A rolled Goo screen will have a slightly bumpy or "orange peel" texture to it. This is entirely normal. Do not attempt to sand or otherwise smooth the surface as this will compromise the performance of the screen. top
Curing Times: The product can be used immediately after rolling or spraying and will look very good after the first day, but its performance will continue to improve for up to 6 weeks by which time the acrylic mixtures should be fully cured and clarified. Following these instructions when applying Screen Goo coatings will give you a uniform high-performance screen surface that will look fantastic for many years to come. Sit back and enjoy, you won't believe your eyes! top
Why Goo instead of typical wall paint? Wall paint is designed and engineered principally to cover an underlying surface and to provide color in a room. These are relatively straightforward objectives and they are accomplished by paint manufacturers through the use of an inexpensive dispersion medium (typically, water-based acrylic or an oil-based medium) to which a pigment or pigments are added to provide color. Usually, relatively small amounts of pigment are used and then supplemented with extenders whose main purpose is to reduce the amount of expensive pigment required to produce the desired color. This can be done because the quantity of light reflected by wall paint is relatively unimportant. By contrast, Screen Goo has been specifically engineered to accurately reflect and disperse the complex colored light patterns produced by video projectors. To that end, Screen Goo starts by employing a premium acrylic dispersion with very low light absorption characteristics and excellent durability. To minimize light loss and to ensure color fidelity, Screen Goo uses much greater concentrations of pigment than those found in house paint. These pigments are carefully chosen to accurately reflect the full spectrum of color produced by video projectors as opposed to house paints where the goal is to reflect that portion of the light which produces the single desired color. In addition, Goo Systems employs proprietary dispersion and pigment treatment techniques to maximize the reflective properties of the pigments employed. These techniques require custom built machinery and are very time and labor intensive. Lastly, unlike wall paint which involves the application of a single product, a Screen Goo application consists of two different products. Screen Goo Reflective Coats provide an ideal reflective surface to which a diffusive, color correct Finish Coat is added. It is the combination of the reflective Reflective Coat and the diffusive Finish Coat which gives a Screen Goo screen its remarkable qualities of high reflectivity, color accuracy, wide viewing angles and excellent contrast. The icing on the cake is the very special sense of image depth, or feeling of looking into the picture that only a Screen Goo screen provides. top
Why a Grey coating instead of white? One of the key properties of high quality projected video is contrast. Contrast is defined as the difference between the brightest and darkest portions of an image. The latest generations of digital projectors have very little difficulty in producing high levels of brightness. However, the darker areas of an image, specifically black areas, are a different matter entirely. Black is defined as the absence of light. Any light in a room, even light produced by the projector and reflected from the room's wall and ceilings, will compromise the accurate reproduction of black. By using a neutral grey reflective surface, or screen, the levels of incidental or unwanted light can be significantly reduced without affecting color accuracy and overly compromising image brightness. Less unwanted reflected light means better black levels, which in turn means enhanced contrast. Unless the viewing room is completely light controlled, including dark, non-reflective walls and ceiling, a grey screen will always provide better black levels and higher contrast than a white screen. Goo Systems' "Which Goo" online calculator will help you decide which of the Screen Goo grey coatings will provide the maximum possible contrast in your room with your projector. top
My projector isn't listed on the calculator, now what?
Simply select "Other" from the projector drop down menu and enter the requested projector specifications. You can then proceed as if your projector was one the models already listed in the projector drop down menu. top |
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Video
Step
1 - Choose the right roller: We suggest using a 1/4 inch nap, wool and
polyester blend roller. Choose a roller whose label indicates that it is for
smooth and gloss surfaces. We do NOT recommend using foam rollers. 
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