Rice Based Laundry Starch
Is streets ahead of corn based, at least for shirts and linens.
Haven't bought the liquid based starch in ages, as I prefer rice based, however yes, corn starch is corn starch. You can buy powdered Faultless or Argo starch and mix up your own to your liking, or mix to make "spray starch".
Liquid starch is nothing more than laundry corn starch with borax, scent, "ironing aids" and perservatives. If you can find powdered corn starch, you can make laundry starch, but one has to know how to make "cooked/boiled" starch as the powdered starch must be cooked to make the starch better for laundry. Hot or boiled starch is streets ahead of spray starch, and even liquid starch added to the final rinse water or separate starch rinse is better than spray starch.
Back in the glory days of laundry, when it took three days of boiling, scrubbing, washing, and ironing, there were several types of starches used for laundry. Each was chosen depending upon the items to be starched. Potato, rice, corn, arrow root, and, arabic gum were all used.
By the way, speaking of "the good old days", there was a time (up until the 1950's or so), when EVERYTHING, included brassieres, and men's shorts that was laundered was ironed and starched if it was cotton. Many wives, either out of not knowing, or perhaps to get their own back on their husbands would put heavy starch on the man's shorts. Thus the joke about someone having "starch in their shorts", since the resulting effect was very uncomfortable.
Am told starch still sells well below the Mason-Dixon line. Iindeed Texas seems to be the starch leader, where heavily starched and creased shorts are the norm.
Launderess