21x28 3D Pro Pau Canvas 2-1/2" #DP-2128

True 4:3 Cinema Proportion - 21x28 Size

It's intriguing to see size so close to the very popular 22x28 size, just one inch different and in the 4:3 proportion.

Explore other sizes in this same 4:3 aspect ratio:

6x8 • 9x12 • 12x16 • 15x20 • 18x24 • 24x32 • 27x36 • 30x40 • 33x44 • 36x48 • 39x52 • 42x56 • 45x60 • 48x64 • 51x68 • 54x72 • 57x76 • 60x80 • 63x84 • 66x88 • 69x92 • 72x96

Explore Related Products to this 21x28 Size:

• Acrylic Primed Linen: Muir™ • Vintage L22U™ • Santa Cruz™ • Vintage L22U™ • Grenoble™
• Raw Unprimed Linen: Torrey Pines™ • Mandalay™

Pau™ Portriat Smooth Acrylic Primed Artfix Linen

Our smoothest acrylic primed linen canvas. It is a heavy weight linen with a luxurious heavy white ground. It has a bright white tone.

• 100% Belgian Linen 6.1 oz.; Primed Weight 14.0 oz. per square yard
• Medium Heavy Weight, Fine Weave, Portrait Smooth Texture
• Double Sized and Quadruple Primed with acid-free archival quality acrylic gesso
• Impenetrable ground prevents oil paint from leaching through and harming the canvas
• For acrylics, oils, alkyds, and water miscible oil paints
• Linen has natural oils that prevent disintegration over time.

3D™ Pro 2.5 Stretcher Bar • 1/2" Canvas Clearance

1/2" Canvas Clearance is the space between the Bar and the canvas. Generally speaking, more clearance reduces the risk of the canvas touching the wood and creating unsightly lines during painting. Our design provides the optimal clearance so as not to impact your painting, but still leaving enough wood to the maximize strength of the Stretcher Bar.

• Produces a 2.5" deep stretched canvas (Actual depth is slightly thinner)
• 1.25" wide Stretcher Bar
• All Bars have an exclusive groove on the inside perimeter of the frame to which cross braces and Diamond Corner Braces attach
• Solid Ponderosa Pine or Fir from the Pacific Northwest

Solid Wood is Archival - Finger Jointed Wood is Not

We only use Solid Wood to build our Stretcher Bars because a solid piece of wood will last indefinitely. When we speak of archival value, it's not just the paint you use and the quality of your canvas and ground, even the wood choices manufacturers make are part of the archival process.

The principal reason manufactures use finger jointed wood is reduce cost, not increase archival value. Wood constantly grows and shrinks when the environment becomes hotter, or colder, or more humid, or more dry. Because finger jointed wood is made-up of multiple and varied pieces of wood, with varying grain patterns and densities, they each absorb and shed moisture at varying rates, which works on the glue joints that hold them together, causing the wood to bow and the joints to eventually fail, and certainly not consistent with increasing the archival value of your artwork frame support.

As a manufacturer, we do our part to conserve as much wood as possible, and still provide a quality made product that will out-perform any other in the marketplace.

21x28 2.5" Deep Edge Heavy Frame Offers Maximum Support!

• Drawing depicts the exact frame construction, not the proportion
• 2.5" Deep Edge K2 Heavy Stretcher Bars are precision machined with a unique double tongue-and-groove corner joint that provides rock-solid torsional rigidity that resists warping or twisting, which is an important benefit for such a deep edge canvas
• One super strong 3/4" thick keyable brace provides maximum possible support for this 21x28 frame - Brace is permanently installed in the frame, but canvas tension may be increased by tapping-in the keys or wedges that slightly expand the size of the frame
• The Stretcher Bars have an proprietary utility groove on the inside perimeter of the frame which is used to attach braces and other optional frame supports
• The Masterpiece brace feature an exclusive system that allows you to increase the tension to the middle of the canvas, where the tension is needed the most; it's so unique it earned us a patent
• To increase canvas tension: 1) remove any staples in the corners and those that retain the brace keys in the middle, 2) tap all of the expansion keys further into their respective slots, 3) tighten and re-staple the canvas in the corners

Canvas Tension is in Your Control

In dry climates or air conditioned environments, the lack of moisture in the air causes wood frames to shrink and the canvas fibers to narrow and elongate making the canvas more slack and resulting in a loss of canvas tension. In some instances, the canvas could have waves on the surface resulting in an unsightly viewing experience.

Our 3D™ Pro 2.5 professional frames provide the functionality for you to slightly expand the size of the frame in the corners and the middle of the canvas, thereby increasing canvas tension all across the surface. The difference between a loose canvas and a tight canvas is just 1/8" of an inch, so a small adjustment using our corner and brace keys makes an important difference in canvas tension.

• Helps to prevent waves that occur in a loose canvas
• Increase canvas tension by tapping-in the corner and brace keys
• True professional class canvases make it possible for you to adjust the canvas tension

Cross Braces Make it Tighter

A tightly stretched canvas on an un-braced frame overpowers the Stretcher Bars causing them to bow inward and thereby lose tension. Sometimes that bow can expose a space in picture frames.

When a canvas is stretched on a properly supported frame, the cross-braces prevent the Bars from bowing thereby achieving maximum canvas tension. To increase the canvas tension even more, simply tap the corner and brace keys further in their slots. Properly supported frames provide you with the control over the canvas tension of your canvas and painting.

Sustainability is about Reducing Deforestation

Choosing products made with sustainably sourced lumber is an important way for consumers to make a positive impact on the environment. By supporting sustainable forestry practices, we can help to reduce deforestation, promote biodiversity, and mitigate climate change. It's a simple and effective way to make a difference.

Specially Dried and Heat Treated Lumber

Our wood is handpicked from a curated group of environmentally responsible lumber mills in the Pacific Northwest. By adhering to our precise drying and heat-treatment standards, these mills produce lumber with nearly half the moisture you'd find in common home improvement outlets or lumber yards. This meticulous process not only enhances the wood's strength—minimizing risks of cracks, splits, or bends—but also elevates its dimensional stability. Such quality, despite its premium, is paramount in creating professional canvases designed to uphold the sanctity of your cherished art throughout the years.

MuseumWrap™ Stretching Technique

With more than a half a century of American engineering, Masterpiece® designs and builds its own proprietary stretching equipment that enables us to produce the finest and most tightly-stretched canvas on the market.

• Drum-tight stretch!
• Up to 50% tighter than other methods
• Balanced tension across the surface
• Uncut folded corners make it possible to remove and re-stretch canvas on the same size frame
• Usually the corner folds are on the long sides

Our mission at Masterpiece® is to deliver the premium quality products that add value to your art. We are widely recognized as the nation's leader and trendsetter of professional quality fine-art canvas. Not only do we have the widest selection of products, but we feature intriguing aspect ratios and sizes with a purpose to add new dimensions to your art.

The first duty of a man is the seeking after and the investigation of truth. ♦ Cicero

Cicero's profound observations on the human condition often illuminated the quest for knowledge and understanding as central to one's existence. In a world characterized by shifting allegiances, political intrigues, and transient pleasures during his time, Cicero regarded the pursuit of truth as a guiding principle, a beacon illuminating the murky waters of life's uncertainties.

This call to seek truth can be likened to the insatiable drive to express, explore, and understand both the world around us and the depths of our own inner landscapes. Art becomes the vessel, the medium through which we investigate and interpret the multifaceted truths of our existence. Whether we're capturing the raw emotion of a moment, the intricate patterns of nature, or the complex interplay of light and shadow, our creations are testament to our commitment to uncovering truth. And as we navigate our art careers, this dedication becomes our compass, guiding us through challenges and leading us toward authenticity. The masterpieces we produce, then, are not just reflections of our skill or technique, but also embodiments of the truths we've sought and discovered along our path.

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Celebrating the creativity in all of us, we've taken a step provide these words of wisdom and to immortalize Cicero through our own unique portrait. Pick up your brush and create!

Tight'n'Up™ Liquid Canvas Retensioner

While all of our Masterpiece® Pro canvases are stretched very tightly and our frames have a built-in method to increase tension, we have another method to add canvas tension. Tight'n'Up™ Liquid Canvas Retensioner (sold separately) can be sprayed on the back of a canvas to repair most canvas tension issues.

With Tight'n'Up™, you can add tension to just a small area, or a large area. Simply spray it lightly on the back and brush it into the canvas, and within seconds, your canvas becomes tighter and stays tighter. The more you use, the tighter it gets.