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    PROJECTS ONLINE: CUTTING GLASS AND RIGID PLASTIC

    Project Difficulty: Easy
    Estimated Project Time: 15 minutes

     
     
    Tools and Materials:

    Glazing panel (glass or rigid plastic)
    Safety goggles
    Work gloves
    Measuring tape
    Newspapers
    Carbide-tipped scoring tool or a utility knife (for plastic)
    Wheel-type cutter (for glass)
    Straightedge
    Framing square
    Narrow wood dowel

     
           

    Most often, if you need to cut glass or rigid plastic (acrylic), it's for the purpose of replacing a broken or cracked windowpane. Sometimes, however, it could be that you are replacing the broken panel of a picture frame. No matter what the end purpose for the glass or plastic, the procedure for cutting it is the same, and, using the proper tools and with a certain amount of practice, it is a simple job to do. An important part of the process is to make sure that you take accurate measurements for the replacement piece that you need, cutting it 1/8 inch shorter and narrower than the opening.

    The instructions below are for cutting single-pane (not safety or double-pane) window glass or rigid plastic up to 1/4 inch thick. For thicker plastic, you need to cut it using a saw. While working with the rigid plastic, leave on the protective sheeting that covers it; it's there to prevent the plastic from becoming scratched or damaged. Remove this covering before installing the panel.

    To protect yourself, wear work gloves and safety goggles. To safeguard the glass or plastic, pad the work surface using several layers of newspapers. Measure accurately and use a straightedge to help you score an accurate line. To cut an edge perpendicular to the first, use a framing square. As you work, clean up any glass or plastic shards and debris. If you have never before cut glass or plastic, you might want to practice first on a scrap piece.

     

     
     
    1. Use Proper Scoring Tool

    Use a carbide-tipped scoring tool (left) or a utility knife if working on plastic; use a wheel cutter (right) for single-thickness window glass. (Fig. 1)

    2. Prepare the Work Surface

    Work on a flat surface with a straightedge or framing square to guide the cutter. Sheets of newspaper provide a cushion. (Fig. 2)

    3. Score the Surface

    Press down firmly as you draw the scoring or cutting tool across the surface of the panel. Score only a single line and do not press too hard because the panel might break. Hold the tool straight and perpendicular to the surface, letting the straightedge guide the tool. (Fig. 3)

    4. Snap on the Scored Line

    Set a narrow wood dowel under the scored line, and apply gentle pressure on both sides of the line to snap the glass or plastic cleanly. (Fig. 4)

    Repeat this process to cut additional lines. If it must be perpendicular to the first line, as for a replacement pane of glass, use a framing square.

     
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