One of these might work. There is a whole area of folk art or work that references folk art or other printed ephemera which has been recouped by artists over the years - starting in the late 19th century (Epinal prints and such like). Even earlier there is a whole category of art produced by even the most famous artists for particular occasions, parades, theatrical productions, celebratory events, etc. that did not generally survive (and was not intended to do so).

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Note added at 3 hrs (2012-03-23 13:32:38 GMT)
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Art ephemera are particularly likely to record transient and informal organizations and associated contingent strategies from the unstable and fugitive terrain of ‘alternative’ art activities, which have been a vital part of contemporary practice. Their qualities, as art ephemera, give them a value as a source of potential histories, which might otherwise remain obscure. I am most concerned in this project, with art practices which are not object-based, which are tactical and contextual and in which the idea of ‘alternative space’ remains operative, taking place London in the late 1990s.

http://eprints.gold.ac.uk/142/

Transformative art offers a different architecture. Sometimes this re-visioning is closely linked to a particular theory of perception (Seurat, Picasso/Braque, Baer, Turrell); sometimes it changes our experience of supposedly 'non-art' reality into an aesthetic moment (Cage, Warhol, Duchamp, conceptual art); sometimes art captures the poetry of moments that are otherwise so transitory as to escape notice entirely (Vermeer, Brueghel) or so sublime/terrible that they are reminders of the transcendent (German Romanticism, Picasso, Delacroix). And some art works purely symbolically-psychologically, involving our deep, emotional selves in a visual experience (Rothko, Pollock). In all of these cases, art is a form of contemplative practice, taking us out of mundane consciousness and into a mind-state in which the conventions of the quotidian may be seen as the contingent ephemera that they are.

http://www.zeek.net/art_03044.shtml

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Note added at 3 hrs (2012-03-23 13:34:35 GMT)
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I am tempted to suggest 'transient', not as a translation, but just because it would work well in the string of adjectives.

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Note added at 4 days (2012-03-27 17:36:46 GMT) Post-grading
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Glad to have helped, tatyana!