I have heard that the blue pounce doesn't come off with iron. Suggest you test first. There are two products...chalk to be pounced and a similar looking product cslled Miracle chalk. Miracle chalk will iron off and not the chalk pounce. Pounce is in black container and miracle chalk is in red eraser type container. I have been told the manufacturers of MC has not found a product that successfully is removed with iron. Suggest you use these products with caution. Reading these posts it appears all are trying to make something work in a way it was not intended. I believe the stencil you have is similar to a silk screen marking is to rub chalk thru the screen onto the fabric. The chalk will not stay on thru folding and rubbing as it is quilted. That is the nature of the product. Miracle Chalk will stay on longer as it has another ingredient along with the chalk.