what rigid materials do you print on?

[petepaz]

well if you have seen my latest post i am having some issues printing on sintra. weird situation still haven't figured it out. here is the link if you are interested

http://www.signs101.com/forums/showthread.php?110694-roland-LEJ-printing-problem

so i was just wondering what everyone else is using other than sintra but similar type of material.