Sheets and films are the consumable parts of a resin 3D printer — the items that wear out before anything else. The group covers FEP film for the bottom of the vat and flexible build plates in a range of sizes, from which a print is freed by flexing the plate rather than levering it off with a spatula. Formats here suit the common desktop resin printers used in modelling, from small plates up to large areas.
Below: when film has reached the end of its life, what a flexible plate changes compared with a rigid one, and how to look after both.
The film closes the bottom of the vat, and every layer of the print is pulled away from it. Repeated stress stretches and clouds the material, release worsens and prints start failing — typically thin parts and supports disappear first. The film is a consumable, not a fault; it is replaced according to how hard the printer works, and a spare is best bought before it is needed.
A rigid plate has to be parted from the print with a spatula, which on small parts often damages them. A flexible plate is lifted out and bowed, so the print releases itself. On model parts with thin edges, that is the difference between a finished component and an exercise in patience.
The second benefit is that you are not levering against the plate, so you do not spoil its flatness — and flatness is what first-layer adhesion depends on.
Plates are supplied in dimensions matching particular build platforms. Measure yours and compare: an undersized plate costs you part of the print area, and an oversized one either will not fit or will not sit flat. Formats run from small plates to areas over two hundred millimetres across.
Rinse the surface after printing and let it dry, because uncured resin residue hardens into a layer that spoils adhesion for later prints. Check the vat in the same way for a piece stuck to the film, which the plate would press onto at the next start. Use gloves and cleaners intended for resin work, and never clean the surface with anything that will scratch it.
Buy printing consumables with a margin, because film always tears while a part is half finished. The whole area is in 3D printing.
