Can books and papers hold mycotoxins?

Why paper is a hard material

Paper is made from plant fibers, and many common indoor molds feed on exactly that. A box of books in a basement that stays damp through a humid summer can grow mold without ever being flooded. Even when paper stays dry, it’s porous and slightly rough, and the edges of a closed book act like a dust trap. Tightly packed shelves, sealed cardboard boxes and filing cabinets in damp rooms hold still air and moisture, which makes the problem worse.

That gives two separate situations. Books that grew mold have contamination worked into the fibers and bindings. Books that sat in a moldy house but never got damp mostly carry settled dust on their surfaces and page edges. The second group is far easier to deal with.

A practical way to sort them

Condition	Usual path
Got wet, or visible mold on pages, covers or spine	Discard, or send to a conservator if it can’t be replaced
Dry, but musty smell that doesn’t fade after airing out	Isolate in a dry room and decide later. Replacement is often simpler.
Dry, stored in an affected room, dust only	HEPA vacuum and keep
Glossy or coated covers, dust only	HEPA vacuum, then wipe the cover with a barely damp cloth
Irreplaceable books, letters or photos with growth	Scan or photograph first, then consult a conservator

Books are one of many categories in cleaning mycotoxins on belongings, which covers the same four-way decision for furniture, fabrics and electronics.

Cleaning dry books

• Work outside or in a contained area, not in the room you’re trying to keep clean.
• Wear a well-fitted respirator and gloves if the books came from an affected space.
• Hold the book closed and HEPA vacuum the top edge first, then the other edges and covers, using a soft brush attachment on low suction. A piece of fine mesh over the nozzle keeps loose pieces from being pulled in.
• Don’t use water, bleach or disinfecting sprays on the pages. Moisture is what mold needs, and chemicals can stain or weaken paper.
• Store cleaned books in a dry room with steady humidity, with some space on the shelves for air to move.

Dust from books is still dust, and the same principles apply as for the rest of the house. Our page on mycotoxins in dust explains why capturing it matters more than spraying it.

Documents, records and photographs

For paperwork you need but don’t need in its original form, scanning is usually the simplest answer. The copy carries no dust, and the original can be discarded or stored sealed. For family photos, archives and valuable books, library and archival preservation offices, including the Library of Congress, publish guidance on mold-damaged collections, and a paper conservator can advise on what can be saved. Freezing wet papers is a common holding step used by conservators to stop growth until they can be dried properly.

Deal with the room first. Cleaning books and returning them to a space that still has a moisture problem or contaminated dust starts the cycle again.

We remove mold and mycotoxins from buildings and their contents. We don’t diagnose or treat medical conditions. If anyone in the home has symptoms, please talk with a doctor, and with your permission we’ll share our findings with them.