I don’t know. Dunking the fabric in a starch solution sounds like a lot of starch. I used to make up a starch with boiling water and cornstarch. 2 cups water to 1 teaspoon cornstarch? It had a few different options. Light, medium and heavy starch. I used this technique for years. Now I’m happy to just iron with a little steam. Always have used the Rowenta iron. I do have a water spritzer bottle I used. It’s the one the hairdressers use.