Dúch

Is léacht é an dúch. Úsáidtear sa scríbhneoireacht, sa líníocht agus sa gclódóireacht é. Tá sé in úsáid le 3000 nó 4000 bliain. Tháinig dúigh na Síne ar an bhfód sa 12ú haois RC.

Leabharliosta 
 N.a. (March 2000), "Bach Scores Turning to Dust in German Library", American Libraries: 24–25
 Barrow, W.J. (1972), Manuscripts and Documents: Their Deterioration and Restoration, Charlottesville: University of Virginia Press, ISBN 081390408
 Reiβ̞land, Birgit; de Groot, Suzan (August 15–21, 1999), "Ink Corrosion: Comparison of the Currently Used Aqueous Treatments for Paper Objects", Preprint from the 9th International Congress of IADA, pp. 121–129
 Rouchon-Quillet, V.; et al. (2004), "The Impact of Gallic Acid on Iron Gall Ink Corrosion", Applied Physics A 79: 389–392, doi:10.1007/s00339-004-2541-1
 Waters, C.E. (1940), Inks, U.S. Department of Commerce, National Bureau of Standards, United States Government Printing Office
 Cueppers, Christoph (1989). "On the Manufacture of Ink." Ancient Nepal - Journal of the Department of Archaeology, Number 113, August-September 1989, pp. 1–7

Naisc 
 Forty Centuries of Ink (David N. Carvalho); A detailed online textbook 
 Roman ink article by Alexander Allen In Smith's Dictionary Greek and Roman Antiquities (1875), in LacusCurtius
 Ancient and Modern Ink Recipes (David N. Carvalho)

Dúch