Bent panels, bonded assemblies, museum vitrines and installations — where the question is not whether it can be made, but whether it can be made, shipped and installed without a seam showing where you will see it.
Large acrylic work is not made from large sheets — it is made from standard sheets joined together. The whole design question therefore becomes: where does the joint go, and how visible will it be?
A solvent-bonded joint in clear acrylic can be made nearly invisible, but only under the right conditions: matched sheet, clean edges, controlled solvent application, and enough clamp time. Under grazing light — which is exactly how architectural acrylic is usually lit — even a good joint will show a faint line.
So the first thing we do on a large project is ask where the light comes from. If a joint can be placed at a corner, behind a return, or at a height where the viewing angle hides it, the whole problem disappears. If it cannot, the options are a mechanical joint designed as a feature, a coloured or frosted finish that masks the line, or a change in panel size.
Bending 20 mm acrylic is a different process from bending 3 mm. The heat has to penetrate the full thickness, which means longer dwell at temperature and slower cooling. Rushing either step produces the two classic defects: bubbles from trapped moisture, and a white haze along the bend from over-heating.
Moisture is the main culprit and it is invisible until the sheet is hot. Cast acrylic absorbs water from the air, and thick sheet holds more of it. The fix is straightforward and non-negotiable: pre-dry the sheet in an oven before forming. Suppliers who skip this step produce bends that look fine on the bench and haze in service.
The working window is roughly 150–170 °C. Below it the sheet will not deform evenly and you get spring-back; above it the material degrades and the bend goes white. Minimum bend radius also scales with thickness — a 3 mm sheet can take a tight radius, a 20 mm sheet cannot, and forcing it cracks the outer surface.
An oversized acrylic panel is a large, flat, brittle object. It does not travel well in a standard crate, and the failure usually happens on the last hundred metres rather than the first thousand.
We build crates to the panel, not to a standard size: full-face foam, edge protection on all four sides, and a vertical or near-vertical orientation so the panel does not carry its own weight across a span. Horizontal transport of a large thin panel is how they crack in the middle.
For installation, the brackets are designed and fabricated here and shipped with the panels, with a marked layout drawing. Where the site team is not ours, we mark fixing points on the protective film so nobody has to measure from a drawing on a ladder.
A museum vitrine has requirements that ordinary display work does not: the glazing must not distort the object, must not reflect the viewer, and must not off-gas anything that could affect the collection.
Avoiding distortion means specifying optical-quality sheet and keeping the panel flat — a vitrine face that bows slightly will distort the object behind it. Avoiding reflection usually means an anti-reflective coated sheet or careful lighting geometry, and the two solutions have different costs.
Off-gassing is why we use virgin cast acrylic and avoid certain solvent bonding formulations for enclosed vitrines. Where a collection is sensitive, the vitrine is allowed to cure fully and ventilate before delivery, and we will say which bonding system was used so your conservator can assess it.
Questions on this line
Sheet is available up to roughly 2050 × 3050 mm in common thicknesses. Larger faces are produced by bonding, and the joint position becomes a design decision rather than a manufacturing detail. We will show you where the joint lands on your drawing before anything is cut.
Nearly, in clear acrylic, under the right lighting and with matched sheet — but not perfectly, and anyone who promises perfectly is overselling. The reliable approach is to place joints where the viewing angle hides them, or to design the joint as a deliberate feature.
We fabricate the structural brackets and ship them with a marked layout drawing. On-site installation is arranged through partners for larger projects in China; for export projects we supply the fixing design and support the installing contractor remotely.
A dimensioned elevation, the lighting direction and the installation method are enough for us to propose a joint layout. That proposal is the first real decision on any large acrylic project.
