How-to: Homemade Sidewalk Chalk

pour the plaster of Paris into the toilet paper rollIt’s unlikely you’ll need to do much to prepare your molds in any special way. Silicon molds can be turned inside-out to unmold your finished chalk. Regular muffin tins can be turned upside-down and given a good thump. Cardboard containers used as molds can simply be peeled off of the finished chalk.

To make a nice, big chalk stick, seal one end of a toilet paper tube, a cut-down paper towel or wrapping paper tube, or the long, narrow box that a tube of toothpaste comes in with duct tape. To make other shapes of chalk, search your recycling bin for other likely containers–if the container can be ripped or cut, then you’ll be able to unmold your finished chalk just fine when it’s set.

When you have your molds and your plaster of Paris mixture ready, simply pour the dyed plaster into each mold, thump the mold onto your work surface a few times to release any bubbles, and let it rest until it’s set, which will likely take longer than indicated by the directions on your plaster of Paris package, since you’ve added in that pigment.

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Written by Julie Finn

I'm a writer, crafter, Zombie Preparedness Planner, and homeschooling momma of two kids who will hopefully someday transition into using their genius for good, not the evil machinations and mess-making in which they currently indulge. I'm interested in recycling and nature crafts, food security, STEM education, and the DIY lifestyle, however it's manifested--making myself some underwear out of T-shirts? Done it. Teaching myself guitar? Doing it right now.

Visit my blog Craft Knife for a peek at our very weird handmade homeschool life; my etsy shop Pumpkin+Bear for a truly odd number of rainbow-themed beeswax pretties; and my for links to articles about poverty, educational politics, and this famous cat who lives in my neighborhood.

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