Iron gall ink (English Wikipedia)

Fruen, Lois (2002). "Iron Gall Ink". The Real World of Chemistry. Kendall/Hunt Publishing. ISBN 978-0-7872-9677-3. Archived from the original on 30 April 2016.

chicagotribune.com

Liu, Yun; Cigić, Irena Kralj; Strliča, Matija (2017). "Kinetics of accelerated degradation of historic iron gall ink-containing paper" (PDF). Polymer Degradation and Stability. 142: 255–262. doi:10.1016/j.polymdegradstab.2017.07.010.

Eusman, Elmer (1998). "Iron gall ink – Chemistry". The Iron Gall Ink Website. Archived from the original on 24 April 2019. Retrieved 28 July 2017.

"KWZ Iron Gall inks". Archived from the original on 26 March 2020. Retrieved 23 December 2018.

"Platinum Classic iron gall inks". Archived from the original on 9 March 2019. Retrieved 21 December 2018.

Liu, Yun; Cigić, Irena Kralj; Strliča, Matija (2017). "Kinetics of accelerated degradation of historic iron gall ink-containing paper" (PDF). Polymer Degradation and Stability. 142: 255–262. doi:10.1016/j.polymdegradstab.2017.07.010.

Eusman, Elmer (1998). "Iron gall ink – Chemistry". The Iron Gall Ink Website. Archived from the original on 24 April 2019. Retrieved 28 July 2017.
Fruen, Lois (2002). "Iron Gall Ink". The Real World of Chemistry. Kendall/Hunt Publishing. ISBN 978-0-7872-9677-3. Archived from the original on 30 April 2016.
"KWZ Iron Gall inks". Archived from the original on 26 March 2020. Retrieved 23 December 2018.
"Platinum Classic iron gall inks". Archived from the original on 9 March 2019. Retrieved 21 December 2018.
"Guidebook for The Clergy, HM Passport Office, General Register Office, Issued: 2011, Last Updated: February 2015, Ink, 1.9, Page 7" (PDF). Archived from the original (PDF) on 15 September 2015. Retrieved 5 February 2016.
"Dienstordnung für Notarinnen und Notare (DONot), Abschnitt Herstellung der notariellen Urkunden § 29" (in German). Archived from the original on 26 June 2014. Retrieved 17 November 2012.
"IS 220 (1988): Fountain Pen Ink – Ferro-gallo Tannate (0.1 percent iron content) Third Revision" (PDF). Bureau of Indian Standards. Archived from the original (PDF) on 3 March 2016. Retrieved 12 August 2014.

Flemay, Marie (21 March 2013). "Iron Gall Ink". Traveling Scriptorium. Retrieved 2 May 2018.