Japanese handmade paper, known as washi, is the gold standard for preserving and mending historical documents. Its ultra-long plant fibers provide unmatched strength in remarkably thin weights. It is entirely acid-free, naturally resistant to degradation, and completely reversible, making it indispensable for archivists.

Chemicals and chemical solvents act as the liquid tools of the archival industry. They reverse chemical decay, remove past damaging interventions, and eliminate biological threats.

In professional conservation, ordinary commercial soaps, bleaches, and detergents are strictly banned. Conservators rely exclusively on pure chemical reagents and solvents to ensure all treatments remain safe, precise, and completely reversible

1. Halting Acid Decay (Deacidification)

The single greatest chemical threat to historical paper is acid hydrolysis, which breaks down cellulose chains and leaves paper brittle and yellow.

2. Dislodging Old Adhesives and Stains

Historical documents are routinely marred by decaying sticky tape, animal glues, or greasy fingerprint oils. Water alone cannot dissolve these materials without tearing the paper fibres, so archivists use targeted chemical solvents based on the polarity of the stain

3. Biological Remediation (Mold and Pest Eradication)

Fungal spores and bacteria consume paper, leather, and parchment, reducing historical materials to mush.

4. Non-Liquid “Dry” Cleaners

Before any liquid or wet chemical treatment can begin, surface dirt and particulate soot must be removed so they don’t permanently dissolve into the paper fibers.