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Exuding Medium

The separation out and collection of medium on the surface of the paint, forming a (locally) shiny film. Often the medium will become liquid and can penetrate to the reverse of the canvas, making it appear 'wet' in patches that follow the forms in the painting.

Related terms

Medium separation
Fluid exudate
Exuding drips
Weeping paint

COMMENT: COMMENT: The exudation of medium can result in the collapse of sharp impasto features underneath the medium film and when removed leave the paint with a rubbery appearance.

Literature

Tank Bronken I.A., Boon J.J., Hard dry paint, softening tacky paint, and exuding drips on Composition (1952) by Jean-Paul Riopelle, 2014, in: Issues in Contemporary Oil Paint, pp 247-262
https://www.jaap-enterprise.com/wp-content/uploads/2016/06/Drip-formation-in-Riopelle-ICOM-CC_2014.pdf

Boon J.J., Lister K., Investigating aged oil-medium phase separating and exuding as drips from a 1960s painting by Pierre Soulages, 2014, in:  Preprints of the ICOM-CC 17th Triennial Conference, Melbourne, 15-19 september 2014., art. 1317
https://www.icom-cc-publications-online.org/PublicationDetail.aspx?cid=61fffeee-a3c3-425f-a639-c72611601147

Tumosa C.S., Mecklenberg M.F., Oil paints: the chemistry of drying oils and the potential for solvent disruption, 2013, in: New insight into the cleaning of paintings. Proceedings from the cleaning 2010 international conference Universidad Politécnica de Valencia and Museum Conservation Institute. Smithsonian Institution Scholarly Press, Washington, DC, pp 52-58

Corbeil M.C., Helwig K., Poulin J., Analysis of the painted Œuvre of Jean-Paul Riopelle: From oil to mixed media , 2004, in: Studies in Conservation vol. 49 (2004) sup. 2: 'Modern Art, New Museums: Contributions to the Bilbao Congress , pp 170-173

Bayliss S., van den Berg K.J., Burnstock A., de Groot S., van Keulen H., Sawicka A., An investigation into the separation and migration of oil in paintings by Erik Oldenhof, 2016, in: Microchemical Journal vol. 124, jan 2016, pp 974-982

Medium uitzweten

Het uitscheiden en verzamelen van bindmiddel op het oppervlak van de verf, waar het een (lokaal) glanzend, vaak bruinig vlies vormt. Soms wordt het bindmiddel vloeibaar en kan het doordringen naar de achterkant van de doek(drager) waardoor het een 'nat' uiterlijk krijgt in vlakken, die vaak de vormen van het schilderij volgen.

Opmerking: Het uitscheiden van bindmiddel kan als resultaat hebben dat de scherpe impasto kenmerken instorten onder de bindmiddel laag, en wanneer het wordt weggehaald kan de verf een rubber-achtig of juist een mat uiterlijk hebben.

Literatuur

Tank Bronken I.A., Boon J.J., Hard dry paint, softening tacky paint, and exuding drips on Composition (1952) by Jean-Paul Riopelle, 2014, in: Issues in Contemporary Oil Paint, pp 247-262
https://www.jaap-enterprise.com/wp-content/uploads/2016/06/Drip-formation-in-Riopelle-ICOM-CC_2014.pdf

Boon J.J., Lister K., Investigating aged oil-medium phase separating and exuding as drips from a 1960s painting by Pierre Soulages, 2014, in:  Preprints of the ICOM-CC 17th Triennial Conference, Melbourne, 15-19 september 2014., art. 1317
https://www.icom-cc-publications-online.org/PublicationDetail.aspx?cid=61fffeee-a3c3-425f-a639-c72611601147

Tumosa C.S., Mecklenberg M.F., Oil paints: the chemistry of drying oils and the potential for solvent disruption, 2013, in: New insight into the cleaning of paintings. Proceedings from the cleaning 2010 international conference Universidad Politécnica de Valencia and Museum Conservation Institute. Smithsonian Institution Scholarly Press, Washington, DC, pp 52-58

Corbeil M.C., Helwig K., Poulin J., Analysis of the painted Œuvre of Jean-Paul Riopelle: From oil to mixed media , 2004, in: Studies in Conservation vol. 49 (2004) sup. 2: 'Modern Art, New Museums: Contributions to the Bilbao Congress , pp 170-173

Bayliss S., van den Berg K.J., Burnstock A., de Groot S., van Keulen H., Sawicka A., An investigation into the separation and migration of oil in paintings by Erik Oldenhof, 2016, in: Microchemical Journal vol. 124, jan 2016, pp 974-982