May I fold /design napkins on shabbos. (Not the typical way … Flower fan like look inside a drinking glass).
Answer:
Yes, this would be permitted. I refer to the common practice of rolling, puffing up or slightly folding to create a design. This is generally done without hard creases at the edges. In addition no elaborate design should be made similar to making a paper plane, boat,oregami etc..
Sources:
See Shu”t Beer Moshe 8:134, Adnei Shlomo 4:59, Minchas Ish 13:76, Nimla Tal pg. 190.
cf. Shemiras Shabbos Kehilchisa 11:40
