In a similar situation, with similar labels, we use masking tape
or drafting tape rolled into a loop.  It leaves no visible residue on
white walls painted with eggshell finish latex paint.  It will definitely
hold for 10 weeks, and is about as low cost as you can get.

        Having done some scraping of foam core tape in the past my
feelings about it are confined to "hate."

--Helen Glazer, Exhibitions Director
Goucher College, Baltimore, MD
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