Have I brought these pins because me the wide choice of colors and the holder had excited ... Now I work a lot with Nicky substances and for this they have to use ni unfortunately :( You have several long drive so you can see a line, and this can be seen then, unfortunately, on the side of the fabric :( so not really the yellow from the egg ... As it is with normal (not expandable) materials, I can not judge ... but for Nicky I am now looking for an alternative ... continue