How to Stencil a T Shirt
Stenciling your t-shirt is a great way to create unique clothing. All you need is a plain t-shirt, fabric paint, a sheet of cardboard, and contact paper, freezer paper, or plastic sheets for your stencil. First, you'll need to draw your sketch on regular paper, trace it onto your stencil paper, and cut it out. If you're using contact paper, peel off its backing and stick it to your shirt. If you're using freezer paper, iron it on. Or, if you're using a plastic sheet, tape it in place. After that, you'll need to place your sheet of cardboard inside the t-shirt and paint your design on over the stencil. Once it's dry, peel off the stencil and admire your handiwork.
Print or sketch a simple design. Choose something with solid, dark lines, so that you can see it through the contact paper when you go to trace it. Even though you will be using clear contact paper, the paper backing will make the design harder to see. This method is suitable for intricate designs and reverse stencils/silhouettes. Trace your design onto a sheet of clear contact paper. Tape your design to a flat surface first, then tape your contact paper over that. Trace over the design using a permanent marker. If you are having trouble seeing the design, tape the whole thing over a bright window. Do not remove the paper backing from the stencil just yet. Cut out your stencil. Remove the contact paper from the template, but don't peel the backing away. Place the contact paper onto a cutting mat, then cut out the designs using a sharp craft blade. If you have any inner designs, save those as well. Peel the backing off, then stick the contact paper to the t-shirt. Figure out where you want the design to go first, then gently set the contact paper down. Start at one end, then smooth it down until you reach the other. Make sue that you flatten out any ripples or wrinkles. If you had any cutouts for inner designs, be sure to stick those down as well. Place a sheet of cardboard inside the shirt. The cardboard only needs to be a little bit bigger than the stencil. This will keep the paint from soaking through the fabric and staining the back of the shirt. Apply fabric paint over the stencil. Squeeze out some fabric paint onto some sort of palette, then dip a foam brush or a pouncer into it. Gently tap the brush against the stencil; do not drag it past the edges. Avoid using too much paint, otherwise it will loosen the contact paper and leak underneath it. Wait until the paint dries, then peel the stencil off. As the paint dries, run your hand inside the shirt, between the fabric and the cardboard. This will prevent the paint from sticking to the cardboard as it dries. Some types of fabric paint need to be heat-set after they dry. Each brand will be a little different, so be sure to read the label on your bottle of paint carefully! Sketch or print out your design on regular paper. You will be tracing this design onto the freezer paper, so make sure that you use thick, dark likes for your design. This method works great for reverse stencils, such as silhouettes. Trace your design onto the freezer paper. Tape your design to a table first, so that it doesn't move around, then tape the freezer paper on top of that, shiny-side-down. Trace use a pen to trace over your design once more. If you are having trouble seeing the design through the freezer paper, tape everything to a light table or a bright widow. Make sure that you are using freezer paper, not wax paper or parchment paper. Cut your design out using a craft blade. Transfer your freezer paper to a cutting mat. Cut out the design as precisely as you can using a craft blade. You can also try using a small pair of scissors. Do not cut past the outline of your design. If your design has an inner shape, save that shape. Iron the freezer paper, shiny-side-down, to a t-shirt. Place the freezer paper, shiny-side-down onto your shirt where you want the design to be. Iron the entire shirt using a hot, dry iron. The heat of the iron will cause the freezer paper to stick to the shirt. Focus on the edges of the freezer paper. If your design has an inner shape, iron that shape to the shirt as well. Tuck a piece of cardboard inside the shirt. The cardboard needs to be a little larger than your design. It will prevent the paint from soaking into the back of the shirt. Apply fabric paint over the design using a pouncer or foam brush. Squirt some fabric paint onto a paper plate, plastic lid, tray, or any other sort of pallet. Dip your pouncer brush into the paint, then lightly tap it over the stencil. Do not drag it back and forth and do not over-saturate the shirt. You can apply more than one layer of paint. Wait about 20 minutes before doing so. You can also use fabric spray paint instead. This is great if you want to use multiple colors for an ombre effect. Allow the shirt to dry before removing the cardboard. This can take a few hours to overnight. As the shirt is drying, run your finger under the fabric to separate it from the cardboard. This will prevent the two from sticking together. Once the shirt is dry, you can pull the cardboard out. Peel the freezer paper off of the shirt. Discard the stencil, or save it for another design. Freezer paper stencils usually last for a few designs; they do lose their adhesive power overtime, however. Some types of fabric paints need to be ironed after they dry. Read the instructions on your bottle of paint for any further instructions. If you are going to reuse the stencil, make sure that you wipe any paint off of it. Sketch or print out your design into paper. A simple image with clear lines will work the best. If you will be using a darker color of plastic for your stencil, then make sure that you use thick, dark lines for your design. Trace your design onto a sheet of thin plastic. Tape your design to the table first, then tape the acetate over it. Trace over the design using a permanent marker. Acetate sheets and blank stencils work especially well for this. You can find acetate in office supply stores and printing shops. You can find blank stencil plastic alongside the regular stencils in arts and crafts stores. Cut the stencil out using a craft blade. Transfer your stencil to a cutting mat. Cut out the design as carefully as you can using a sharp blade. Discard the inner parts of the stencil, and save the outer portion. You will need the straight edges to secure the stencil to the shirt; this design won't work on silhouettes. Tape down your stencil to the shirt. Place the stencil onto your shirt where you want the design to go. Smooth out any wrinkles or ripples, then tape down all four edges of the stencil sheet. Place a sheet of cardboard inside the shirt. The cardboard needs to be a little bit bigger than your stencil. It will keep the paint from soaking through the fabric and onto the back of the shirt. Apply the paint. Work your way from the outside edge of the stencil to the middle. Do not drag the paint from center-out, or you will get paint under the stencil. You can use a foam roller, a pouncer, or a flat brush. Peel the stencil away, then let the paint dry. As the paint dries, run your finger inside the shirt, between the fabric and the cardboard. This will keep the paint from sticking to the cardboard. Remove the cardboard, then set the paint, if needed. Some types of fabric paints are ready to go once they dry. Other types of paints need to be covered with an ironing cloth, then ironed. Refer to the label on your bottle of paint for more specific instructions as each brand will be different. 
Print or sketch a simple design. Trace your design onto a sheet of clear contact paper. Cut out your stencil. Peel the backing off, then stick the contact paper to the t-shirt. Place a sheet of cardboard inside the shirt. Apply fabric paint over the stencil. Wait until the paint dries, then peel the stencil off. Sketch or print out your design on regular paper. Trace your design onto the freezer paper. Cut your design out using a craft blade. Iron the freezer paper, shiny-side-down, to a t-shirt. Tuck a piece of cardboard inside the shirt. Apply fabric paint over the design using a pouncer or foam brush. Allow the shirt to dry before removing the cardboard. Peel the freezer paper off of the shirt. Sketch or print out your design into paper. Trace your design onto a sheet of thin plastic. Cut the stencil out using a craft blade. Tape down your stencil to the shirt. Place a sheet of cardboard inside the shirt. Apply the paint. Peel the stencil away, then let the paint dry. Remove the cardboard, then set the paint, if needed. 