If you would like to starch the old way, mix some up in a wash basin, usually 50/50 or stiffer if you would like, put your fabric in there, soak, and then dry, this is the way we used to do it. Then you use a water mister, iron as usual. But now days, I use a spray bottle Sta-Flo starch,and spray it that way. Be sure and let it rest a little before ironing, you won't have the flakes, or if I am in a hurry I usually run my hand over sprayed area, this too keeps it from flaking.
Good luck.
Rita