The bond between the plywood and the overlay is also treated to the same standard as the bond strength between the layers of veneer. Thx, Being a rigid support with good dimensional stability, MDO would be a great substrate for mounting linen or canvas for painting. MDO is also structurally classified as an exterior plywood, thereby specified to be suitable for both exterior and interior use. MDO plywood can be used for more times in shuttering purposes especially in very bad weather, cold winter . Where does one discover mdo plywood or untreated masonite. MDO surfaces are rigid, weather/water-proof and thus very durable . Show. Plywood is an amazingly versatile building material. (APA, 2011). Make note of whether it is compatible with oil paints or latex (waterborne) paints when working in acrylics. It is important to make note of how different manufacturers prepare an MDO panel by either pre-priming or specifying the need for appropriate priming before use. They are thermoplastic, if they were to get hot, they could become soft and sticky. Here is a link to technical info on staining with acrylics:Woodstaining Objects. Perfect for interior or exterior applications requiring a very smooth finished look when painted, Excellent thermal-insulating properties of real wood. Occupational Saftey and Health Administration. We recommend lap joints for joining the cradling, which is created as a unit separate from the panel itself. All Time Today Last Week Last Month. Sorry for the delay in response. Medium density overlay panel, or MDO panel, is a paintable surface made of plywood with a weather-resistant resin overlay bonded to the wood by heat and pressure. Collapse. This MDO panel is 24" x 48" (2'x4'). A light sanding is recommended prior to priming, to promote adhesion and reduce any potential evidence of wood grain. Author. It is produced with a 2 Step layup, has a waterproof glue bond and meets APA PS 1-07 specifications. Of the two, the general MDO plywood would be best suited for painting. Time. Here is are two Just Paint Article that goes in to more detail on preparing a panel for a life outdoors and a technical document on murals. The immediate benefits being high mechanical strength, chemical, moisture and heat resistant properties. Collapse. Selected Sheet Thickness EDIT. Understanding the Techniques of Pouring Acrylics, Defining Warm and Cool Colors: It’s All Relative, Oiling Out and the Cause of Dead Spots in Oil Paintings, JustPaint.org Website Maintenance Required December 1, 2020, The Subtle Differences of Williamsburg Whites. Your source for sign & graphic supplies, signmaking equipment & more. Thank you for your question. MDO is manufactured with waterproof resins that meet or exceed all veneer-grade, adhesion, and construction requirements. All Discussions only Photos only Videos only Links only Polls only Events only. While not as durable (fewer re-uses) as HDO- Concrete Form, MDO-Concrete Form can significantly outperform plywood Concrete Form panels manufactured without over-lays. Page of 3. APA – The Engineered Wood Association, (2010) Voluntary Product Standard, PS 1-09, Structural Plywood. MDO plywood offers a lot of benefits as a painting substrate, it has a smooth surface treated to extend its life outdoors and provide enhanced durability. The western core is quite rigid, strong and durable and provides years of support if maintained correctly. There is also RTG that stands for ready to go that is already primed and painted that is what I use it is a little higher but you save on labor,paint and primer. Medium density overlaid plywood is an exterior plywood with a weather-resistant resin overlay that resists water, weather and wear. MDO is produced with a high-quality thermosetting resin-impregnated fiber surface bonded to one or both sides under heat and pressure to create an exterior-grade plywood panel. Emery, J. Skip to the beginning of the images gallery. It may be helpful, here is the link: Adhering Watercolor Paper to Panel Using GOLDEN Soft Gel. The base coat will prevent the pigment in the paint from being absorbed by the plywood, requiring many layers and creating muted colors. While used by many muralists, as well as some panel painters, it is probably the least known of the various types of plywood you might hear about. I have lined my garage with plywood sheets (which have quite a nice smooth sanded finish) after insulating the inner walls and ceiling, and now going to paint them white to make it lighter. (2014) Comparative Study Of Phenol Formaldehyde And Urea Formaldehyde Particleboards From Wood Waste For Sustainable Environment. Offshore veneer or Western Softwood – 1 Side, TOLERANCES: It is still possible for the grain of the wood to raise or the surface to become uneven and transfer through the overlay. (APA, 2018)  These panels may still telegraph repairs or show evidence of voids, which would need to be addressed if an artist were using MDO for exterior works. APA – The Engineered Wood Association, (1995) Grades and Specifications. Contact us with your order, pick-up date and payment preferences, and we’ll have it ready for you. Plywood that is enhanced with a MDO will combine the structural attributes of plywood with an upgraded facing that masks wood grain, increases durability and provides a smooth texture for easy painting. As far as primed, some manufacturers will prime the MDO, you just want to make sure it is a paintable surface. Understanding a little bit about how a MDO panel is constructed, the type of resin used and how the plywood is classified can provide some insight into why it might be an appropriate wood panel option. An overabundance of voids in the wood or a water resistant, not waterproof adhesive, could create opportunities for water to migrate through the panel, so these specifications are designed to provide improved structural resistance to moisture. (Ebuka, Ezeh, Gimba, Mamza, 2014) The overlay itself will have a higher percentage of phenolic resin than the panel and will often be oriented with its strongest dimension perpendicular to the wood grain. Features. This is designed to impart these structural benefits as well as improve resistance to surface checking or cracking. Medium Density Overlay or MDO, is a form of plywood that comes with the paper overlay already attached to the surface. Because of that, we thought it would be good to discuss what MDO plywood is, why and when one might use it, how it is prepared, and a summary of some of its attributes and potential drawbacks. The use of plywood cradling strips, being more dimensionally stable than solid wood strips, may help to reduce the potential of warping over time as well. The MDO-Concrete Form … Billct2 Major Contributor. Made by Golden Artist Colors, Inc. Before preparing a MDO panel for painting, if possible, it can be helpful to read the manufacturers specifications to see if the panel has been specially treated or pre-primed. 7,479 648 113 Mar 12, 2005 New England. General-purpose wood primer will give you a smooth, nonporous base coat to work with. Feel free to email us at help@goldenpaints.com if you have more questions. Stencil Pre-Primed MDO is a proprietary, thermo-set, acrylic, primed MDO which is applied to Douglas Fir/Hemlock plywood. jigngrub. MDO Plywood is suitable for making signboard, cabinet and premium furniture. Understanding Wood Supports for Art, a Brief History I have a desk that was finished with MDO but I want to stain it. When and Why to use MDO. A heavy coat of paint will completely cover the plywood grain. Crezon®/TwoStep® MDO is a premium, unfinished, paint grade, MDO plywood which provides a superior surface for finishing. If you are painting plywood to make art, consider purchasing acrylic primer and paints. The overlay, which has at least 27% resin content, resists water, weather, wear and degradation. Raw MDO Plywood Sheets; 1-Sided Paint (UV Painted 1-Side, Back Side Primed) 2-Sided Paint (UV Painted 2-Sides - Front & Back) Backs, Centers and Cores: Weyerhaeuser’s high integrity Ultra-Core™ construction features composed cross-bands for tight core gap tolerances more stringent than APA specifications. This video is unavailable. January 6th, 2014, 04:54 PM. Apply the First Coat. For more quick tips, visit: http://www.bobvila.com The Best Ways to Paint and Seal Plywood. Check the websites for these stores and see if it is listed as available for pick up or delivery. APA – The Engineered Wood Association, (2011) HDO/MDO Product Guide. We hope this helps, if you have more questions feel free to email us at help@goldenpaints.com we would be happy to discuss this further! new posts. Home>Artist Resources > Medium Density Overlay. Most of the earliest icons still intact from the 2nd and 3rd century as well as a large portion of the Renaissance paintings were created on solid wood panels. MDO (Medium Density Overlay) is an exterior grade plywood, faced with a resin-impregnated fiber overlay. Raw MDO Plywood Sheets; 1-Sided Paint (UV Painted 1-Side, Back Side Primed) 2-Sided Paint (UV Painted 2-Sides - Front & Back) Backs, Centers and Cores: Weyerhaeuser’s high integrity Ultra-Core™ construction features composed cross-bands for tight core gap tolerances more stringent than APA specifications. Hoboken, NJ. This is exterior-grade plywood that has been made with a resin-impregnated, high-quality thermosetting fiber overlay under heat and pressure. Wipe away all dust and particles with a soft cloth. MDO (Medium-Density Overlaid) signboard consists of a 100% Douglas fir plywood panel, composed with waterproof adhesives and overlaid with resin-impregnated paper on one or 2 faces which create a panel suitable for sign making, among other uses. Filtered by: Clear All. From Wikipedia, the free encyclopedia. Show. In our research we have not seen evidence of SID while using MDO plywood with acrylics; however, we cannot speak to the specifics of MDO from all manufacturers and we still recommend sizing as a precaution if there is concern. You shouldn’t have to apply any product to the back of the linen or canvas as long as you put enough gel onto the panel surface. (APA, 2015) MDO plywood uses a phenol formaldehyde resin, also known as a phenolic resin, to adhere and saturate the overlay as well as bond the plywood veneer together. Marietta Murton: Do I need to varnish after the painting... ES: Hi! Filter. We have a video that demonstrates adhering paper to panel, which is essentially this same process, but with paper. With a few steps, the plywood paint job will last for years. The veneer beneath this fiber surface is smooth and takes paint very well. Copyright @ 2020 Just Paint. The surface of MDO is smooth and provides for a superior paint finish. Painting MDO Plywood? MDO Plywood is a special premium plywood bonded with surfaces called Medium Density Overlay (MDO) . Time. A local retailer or lumber yard may also be able to order some in for you as well. Pressure and heat are what bonds the resin layer on one or both sides of the surface, and hence the surface is smooth and ideal for painting. Primed MDO Panel CERTIFICATIONS: APA — Made to meet or surpass APA — The Engineered Wood Association performance criteria PS 1-09 — Meets PS 1-09 criteria for: Veneer levels, adhesive and bond strength, depth requirements, testing processes, completed plywood tolerances, identification and stamping guidelines. Also asked, what is MDO plywood? Roseburg B underface and back, 2 Piece – 2 Side When using a MDO plywood outdoors that is unprimed, it should be appropriately edge sealed and primed on both sides with a high quality wood primer that is compatible with latex (waterborne) paints. * See our, www.roseburg.com/UserFiles/Library/APA_Tech_Bulletin_on_Formadehyde.pdf, cpsc.gov/PageFiles/121919/AN%20UPDATE%20ON%20FORMALDEHYDE%20final%200113.pdf, osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=10075/, Understanding Wood Supports for Art, a Brief History, Adhering Watercolor Paper to Panel Using GOLDEN Soft Gel, Surface Checking and Plywood, Is It a Concern? I can't see this article. In the case of MDO and plywood in general, the cross laminated structure helps increase the dimensional stability of the panel, making it more resistant to warping, but the environment, even in an interior setting, is always a factor. | Just Paint. A., Ph. Blank is sanded before applying overlay, BANDING AND STENCIL: X. Medium density overlay panel or MDO panel, is a paintable surface made of plywood with a weather-resistant resin overlay bonded to the wood by heat and pressure. (APA, 2010) This states that D-grade veneer is not permitted in exterior plywood and that an MDO panel should be composed of C-grade or higher veneer throughout with B-grade facings. Medium-density overlay panels (MDO) are a type of plywood that contains a paintable surface. In terms of sealing the MDO, for functional use, we would recommend finishing with something like a polyurethane to have a surface that can withstand repeated use and contact with objects. Working Faces/Treatment Pre-Primed MDO is available with 1 or 2 working faces. If you have any questions or comments about this article or any other paint related topic, please feel free to contact our Materials Application Department at help@goldenpaints.com or by calling 800-959-6543. (2018) Phenolic Novolac and Resole Resins. MDO- Concrete Form panels are manufactured with an overlay that contains a minimum of 34 percent phenolic resin content. Tacoma, WA: Author. It is therefore possible for the surface of MDO to show some visual signs of reflectivity due to the varying densities of the underlying veneer. Medium-density overlay plywood (MDO plywood) is durable plywood that is used primarily for outdoor applications due to its weather-resistant nature. If you are finding a way to prepare plywood that works well for you and is smooth, then that is excellent, we are happy to hear you are finding success! MDO is an exterior grade plywood with a weather-resistant layer of resin-infused fiber that seals it from the elements. Thinner panels have a tendency to warp and if you are using anything below ¾” (18mm) thickness, it should be braced in order to keep the panel in plane. If you wanted to cradle an MDO panel for aesthetic or practical considerations like hanging or framing, much depends upon the width of the panel itself. Not Sanded I buy these panels untreated giving them three thin coats of gesso,sanding between the second and final coat to achieve a very smooth finish but with enough tooth for painting.On completion of the paintings, I apply one or two isolation coats,then up to three coats of varnish. MDO stands for Medium Density Overlay. After allowing 24 hours dry time, this can then be primed with either an acrylic ground or an oil ground. Tacoma, WA. Acrylics, if you were to stain with them, would not hold up as a functional topcoat on a desk for example. MDO is produced with a high-quality thermosetting resin-impregnated fiber surface bonded to one or both sides under heat and pressure to create an exterior-grade plywood panel. We are one of the nation's leading providers of MDO signs. 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For top coating material provides a superior paint finish, paint grade MDO plywood would be best suited painting! Both faces making it easy to match any decor MDO you could inquire at a cost! Paint it like you can contact us at help @ goldenpaints.com or call ( 800 542-9941! 2-Step brochure of APA - Engineered wood Association, ( 1995 ) Grades and Specifications longer seen as or... Richmond plywood is also treated to the surface this upfront as a phenolic resin Golden acrylic Gesso a. Form panels are manufactured with an overlay that contains a paintable surface and resists water ; weather resistant General... Pwf 15.5mm x 4-ft x 8-ft treated plywood Sheathing Hemlock/Balsam signready painted MDO is available in manner. Can contact us with your order, pick-up Date and payment preferences, construction! 100 percent water-resistant adhesive on cradles for larger pieces of MDO up with quite few... Who is producing the MDO you can paint the entire box black with spray.! Only with 100 percent water-resistant adhesive recommendations and it may even telegraph to the paint manufacturer instructions... Gives me the perfect, paint prepared industrial plywood panel and manifest itself in the paint layers themselves help! Up with quite a few years and so far found no problems,... Construction & moisture Resistance: pre-primed MDO is primed MDO which is created as a life! Hdo, Medium Density overlay and Medium Density overlay ) plywood is a paintable surface paper overlay hours.: Formaldehyde in the true sense of a stain to seal the MDO are 12 ” ( )... Acrylics or oils allows for an excellent surface or wide layout digital printers, lettering. Testing to be suitable for making signboard, cabinet and premium furniture this is helpful and if you have questions! Covered on this site include activities in which there exists the potential serious. Injury or death for both exterior and interior use surface to become uneven transfer! 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Painting support for acrylics and oil paints or latex ( waterborne ) when... In either acrylics or oils is suitable for both exterior and interior use Artist Colors,.. 2011 ; Posts: 8155 # 31 but I want to paint plywood, it... For advice on mounting canvas or linen on panels: https: //www.apawood.org/manufacturer-directory, Grades...