My husband teasingly accuses me of being a snoot about several things. I like to think of it as being particular. I'm a chocolate snoot (Hershey's really isn't worth the calories to me). I'm a fabric snoot (I simply like good quality fabric. He doesn't quite understand that).
Until recently I'll also admit to being a spray starch snoot. I started using a pricey quilt shop brand and got addicted. It was certainly better than the cheap stuff I was buying at the grocery store. Unfortunately, it was $10 a bottle, and I found myself going through it pretty quickly.
One evening while working on a project, I ran out of spray starch. It was too late to go to the store, and I really wasn't in the mood to pay for it anyway. Enter the internet. I searched for "homemade spray starch" and found several recipes--water, corn starch, and essential oil. It sounded way too simple.
I admit to being really worried when I first started trying this concoction on my fabric. I tested it on some scraps first and was pleasantly surprised to find it worked really well. I've now used this on three different quilts, including cotton and linen fabrics. It's been great. The one downside is that the corn starch settles and requires me to shake the bottle frequently. But, if it saves me $10 a bottle, that's a pretty minimal downside. It leaves no residue on my iron and leaves my blocks perfectly crisp. It can leave some white spotting on dark fabric (which washes out), but I wouldn't recommend using this on your nice black shirt.
This is all you need:
Empty spay bottle
1 pint water
1-2 Tbs corn starch (more will give a stiffer starch)
2 drops essential oil (optional)
Pour the corn starch into the bottle using the funnel. Tap down if needed. Add water and essential oil. Replace bottle lid and give it a good shake. (I have found on my bottle drips just bit during this part from the force of shaking. I simply cover the spray spout with my thumb to minimize drips.)
As with anything new, if you try this, please test first on scraps.