
There are several ways to repair broken plastic eyeglass frames, including melting the plastic, using glue, or sewing the frames back together. Melting the plastic involves using a heat source, such as boiling water or a torch, to soften the edges of the frames and joining them together. Fusing tongs can also be used to repair plastic frames by reaching high temperatures to melt the plastic. However, it is important to note that not all types of plastics used in eyeglass frames accommodate fusing easily. Another method is to use glue, such as super glue or epoxy resin, to bond the broken pieces together. It is important to ensure that the glue is specifically formulated to treat plastics and bond the pieces properly. Sewing the frames together involves using a needle and thread to reinforce the repair and add strength to the joint.
| Characteristics | Values |
|---|---|
| Repair technique | Melting plastic, glueing, sewing, using an eyeglass repair kit |
| Materials | Water, pins, glue, paper, thread, epoxy, UV curing glue, super glue, acetone, fusing tongs |
| Considerations | Plastic type, surface area, stress on joint, precision, safety, alignment |
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What You'll Learn

Using boiling water to melt the plastic
To repair your eyeglass frames using boiling water, you will first need to ensure that your frames are made of plastic. Fill a pot with water and set it to boil on your stove. Once the water reaches its boiling point, turn off the heat. Hold the broken edges of the glasses over the pot, making sure they are close enough to the pot for the heat to soften the edges.
Insert a pin into one edge, and then push the other edge onto the pin. Smooth the plastic around the pin while it is still hot. Do not place plastic eyeglass frames directly over an open flame. You can also use an eyeglass repair kit, which can be purchased at most drugstores.
It is important to note that not all plastics are suitable for melting. For example, HDPE plastic has a melting point of around 130°C, so it will not melt when exposed to boiling water. On the other hand, PET plastic, commonly used for water bottles, will start to lose its shape at 80-90°C, making it unsuitable for use with boiling water.
Some plastics, such as PVC, have a melting point that falls within the range of water's boiling temperature. Water must be within the temperature range of 160-210°C to melt PVC. Therefore, when attempting to melt plastic with boiling water, it is crucial to know the type of plastic you are working with and its melting point.
Additionally, it is important to consider the potential health risks associated with melting plastic. When plastic is heated, it can release toxins, posing health hazards if inhaled or ingested. Always work in a well-ventilated area and follow safety precautions to avoid any potential risks.
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Gluing with super glue or epoxy resin
If you are looking to repair your eyeglass frames with glue, there are a few options available to you. Super glue and epoxy resin are both commonly used adhesives for this purpose. Here is a step-by-step guide on how to use these glues effectively:
Super Glue
Super glue is a straightforward solution for repairing eyeglass frames. Here are the steps to follow:
- Clean the surfaces: Ensure that the areas to be glued are clean and dry. You can lightly sand the surfaces with fine sandpaper and wash them with a household solvent. Allow the pieces to dry thoroughly before gluing.
- Apply the super glue: Squeeze the bottle to dispense the glue and apply it to the break. Make sure there are no air bubbles or gaps in the joint.
- Remove excess glue: Use a cotton swab to gently absorb any excess glue. Roll the swab lightly and quickly over the glued area.
- Clamp and cure: Use a clamp to hold the pieces together while the glue sets. Let the glue cure for at least an hour. You can also drill small holes in the frame on both sides of the joint and pass a band of thread through them for added strength.
- Wrap with thread (optional): If you want extra strength, wrap thread around the bridge of the glasses. Pass the thread through the holes and around the bridge, criss-crossing if necessary. Trim the thread ends and apply a small amount of glue to secure it in place.
Epoxy Resin
Epoxy resin is a strong and durable adhesive, but it can be messier and more challenging to work with than super glue. Here are the steps for using epoxy resin:
- Prepare the epoxy resin: Epoxy resin typically comes in two parts: the resin and the hardener. Mix these two components according to the manufacturer's instructions before applying them to your frames.
- Apply the epoxy resin: Use a tool like a toothpick to carefully apply the mixed epoxy to the broken areas of your eyeglass frames. Be careful not to use too much, as it can spread to the lenses and cause damage.
- Sand if needed: Epoxy resin can leave uneven or rough surfaces. If necessary, sand down the repaired area before it fully sets to create a smoother finish.
- Cure and clean up: Allow the epoxy resin to cure and harden. If you applied too much, you can clean up the excess before it fully cures. You can also use a Sharpie to darken the epoxy and make it less noticeable.
Whether you choose super glue or epoxy resin, always exercise caution when working with adhesives, and be sure to work in a well-ventilated area. Additionally, always ensure that the glue you choose is suitable for use with plastic eyeglass frames.
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Sewing with thread and needle
To repair your eyeglass frames using sewing, you will need a fine needle and thread, a drill, sandpaper, super glue, a painter's stir stick, rubber bands, waxed paper, and cotton swabs.
Firstly, clean the area that needs to be repaired. Lightly sand the area with fine sandpaper and wash with a household solvent. Let the parts dry thoroughly before proceeding.
Next, drill two holes in the frame, ensuring they are far enough apart to create a pleasing elongated shape. Be careful not to stress the core joint or drill too close to the lenses.
Thread your needle with a long length of thread, preferably four to six feet, that matches the colour of your frames. Sew the two sides of the repair together, passing the needle and thread through the holes as many times as possible without putting stress on the joint. Stop when there is no more room.
Fill the drilled holes with super glue, soaking the thread and blotting any excess with a cotton swab. Trim the edges of the thread. You can add an extra wrap for strength by wrapping the remaining thread around the bridge of your glasses from front to back, criss-crossing as neatly as possible. Soak the wrap with glue and let it dry for 10-15 minutes. Trim the loose ends and set your glasses aside for 24 hours before wearing.
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Using fusing tongs to melt the plastic
Fusing tongs are a great way to melt plastic eyeglass frames together. This method is often used by skilled technicians to repair plastic frames. Fusing tongs are composed of a base that electrically produces heat, reaching temperatures high enough to melt most plastics. The base feeds a pair of tongs that distribute the heat, which is controlled by a pedal. This method can be used to replace most hinges from plastic frames and conduct other repairs. It is important to note that not all plastics accommodate fusing easily. For example, nylon and optyl plastics may not be successfully repaired using this method.
When using fusing tongs, it is crucial to exercise caution as you will be working with extremely high temperatures. Make sure to wear protective gear, such as heat-resistant gloves and safety goggles, to shield yourself from the heat and any potential plastic splatters. Ensure that your work area is well-ventilated to dissipate any fumes released during the melting process.
Before using the fusing tongs, inspect your eyeglass frames to determine the extent of the damage and decide on the appropriate repair technique. If you need to replace a hinge, for instance, you will need to carefully remove the broken hinge and prepare the new one. The fusing tongs can then be used to melt the plastic and securely attach the new hinge.
During the repair process, it is important to work with steady hands and a precise technique. Hold the frames with the fusing tongs, applying gentle but firm pressure to ensure good contact between the broken edges. Control the heat using the pedal, gradually increasing the temperature until the plastic begins to melt. You may need to adjust the temperature and pressure depending on the type of plastic and the severity of the break.
Once the plastic has reached a molten state, carefully align the broken edges and hold them together for a brief period to allow the plastic to fuse. Release the pedal to decrease the temperature and allow the plastic to cool gradually. You may use a damp cloth to help speed up the cooling process gently. After the repair is complete, carefully inspect the frames to ensure a strong and seamless join has been achieved.
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Dipping in acetone
To use the acetone method, you will need to ensure that your frames are made of pure acetate. Start by dipping both broken ends of the frame into acetone for about 2 minutes. Then, stick the pieces together using a bit of hand pressure for about a minute. Allow the acetone to fully cure for 1-2 hours before handling the frames extensively.
It is worth noting that acetone can be quite harsh on eyeglass frames and may cause some damage to the finish, making them appear white and dull. If this happens, you can try restoring the finish by sanding down the affected area with light sandpaper and then covering it with clear nail polish. Alternatively, you can use a grinder with a buffing wheel to polish off the affected area, but be sure to remove the lenses before attempting this method.
While the acetone method can be effective for repairing broken eyeglass frames, it is important to exercise caution. Plastics used for eyeglasses are often made from materials that are susceptible to chemical attack, so there is a risk of causing further damage if the process is not done carefully. Additionally, always keep acetone away from the lenses of your eyeglasses, as it can cause damage.
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Frequently asked questions
There are a few ways to melt plastic eyeglass frames together. One way is to use a fusing tool, which is composed of a base that electrically produces heat and feeds a pair of tongs that distribute the heat. Another way is to boil water in a small pot and hold the broken edges of the glasses over the pot, close enough for the heat to soften the edges. You can also dip the broken parts in acetone for about 2 minutes and stick them together with hand pressure for a minute.
There are a variety of glues that can be used to melt plastic eyeglass frames, including super glue, epoxy resin, JB Weld, and plastic model cement.
Instead of melting the frames, you can use a pin to join the broken edges. Boil water in a small pot and hold the broken edges of the glasses over the pot to soften them. Then, push a short pin into one edge and push the other edge onto the pin. Smooth the plastic over the pin while it is still hot.











































