I have not had anyone ask me but all of the prints I sell are printed on Fiber based paper and processed to archival standards. I do discuss all of these things with gallery owners if they are going to display and sell the work. I usually include "Care and Feeding" instructions as well. Even with archival processing the sun is extremely powerfull and any art work should not be displayed in direct sunlight. As for feeding the only thing prints need are human eyes looking at them and enjoying what they see :) :) :) This will keep them and their owners happy for many years.