What type of glue to stick paper on paper without curling? I want to make super thick invitation cards. When I use white glue, it looks great for a day but then it starts curling.

Any idea what I can use ?
Glue stick doesn’t curl paper. You have to be careful what brand you chose, though (some just don’t stick well). Of the ones I know UHU stic would be a good choice – it’s quite strong.