What linen-mounting a poster means
Jerry Polizzi · · Updated
Linen-mounting, also called linen-backing, supports a fragile poster so it can be framed and kept. The sheet is relaxed, tears are set down, and the poster is adhered to cotton or linen canvas with an adhesive that is meant to release later.
What the cloth does
The cloth gives a thin sheet a stable body. Folds relax. A poster that would crack if it were rolled again can hang flat. This is the usual treatment for vintage posters, travel posters, and large exhibition sheets. The trade still says linen when the cloth is cotton canvas. The name matters less than the paste and the paper.
A hard crease that has already broken the fibers can still read as a line after mounting. The job is to make the sheet safe to handle and to frame. It is not a promise that every fold will vanish.
What it leaves alone
Stains, losses, and faded color remain. A careful shop tells you about them before any work starts. Touch-up, if you want it, is a separate decision, and the best touch-up can be reversed later. Mounting does not turn a worn poster into a perfect one.
Taking a mount off later
A careful linen mount uses a paste that moisture can release, so the cloth can come off in the future. That is still wet, slow work, and a brittle poster can tear if someone rushes it. It is a job for the shop, not a soak at home.
Dry-mounting
Dry-mounting is a different process. It uses heat and a tissue that is meant to stay put, and it is a poor choice for anything you hope to keep. If a poster is already dry-mounted to cardboard, say so when you ask for a quote. It changes what can be done. Restoration and linen mounting is where that work starts, and how to frame a vintage poster is the step that should follow.
These notes are the advice we give across the counter. They are not an appraisal and not a conservation report.
Questions
Should every old poster be linen-mounted?
A poster that will be framed, shipped, or handled, and that is folded, torn, or too thin to hang flat, usually wants a support. A strong sheet that is already flat may only need a hinge and a frame. The sheet gets looked at before any work starts.
Does linen-backing remove the fold lines?
Folds relax. They do not always disappear. A crease that has broken the paper can still show as a line.
Can you frame a poster that is already stuck to cardboard?
Often yes, but say so before anyone quotes the job. Dry-mounting to cardboard changes what can be done.