Sofia Martinez
Writing on plastic containers can be tricky, but there are several ways to do it. You can use markers, such as EXPO Low Odor Wet Erase Markers, Pilot Name Markers, or Zebra Mackee Care Double-Sided Markers, which are designed to write on plastic. To ensure that the ink sticks to the plastic, you can prepare the surface by cleaning it with soap and water, using a soldering iron to etch the plastic, or passing the plastic over a flame to lightly burn it. You can also use tape, such as good labelling tape or wash tape, to write on and then stick to the container. Another option is to use a laser marker or melt dots of the same material onto the container to create a primitive dot code.
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What You'll Learn
Preparing the plastic surface
Clean the Plastic Surface
Start by scrubbing, wiping, and thoroughly cleaning the plastic surface. Use a combination of soap, water, and alcohol to remove any dirt, grease, or oily fingerprints. It is essential to get rid of these marks because they can interfere with the adhesion of the ink. Make sure the surface is completely dry before proceeding to the next step.
Sand the Surface (if needed)
Once the plastic surface is clean and dry, inspect it for any rough spots or imperfections. If you notice any areas that need smoothing, you can lightly sand them with fine-grit sandpaper. This step will help create a more even surface for the ink to adhere to.
Flame Treatment (optional)
Some people suggest using a flame treatment to prepare the plastic surface. This involves passing the plastic quickly back and forth over a flame, such as a candle or a small propane torch, without melting or discolouring the plastic. This technique lightly "burns" the surface and can help the ink adhere better. However, be cautious and ensure proper ventilation during this process.
Apply a Primer or Coating (optional)
In some cases, you may want to apply a primer or coating to the plastic surface before writing. This can help the ink adhere better and create a more durable finish. However, this step may depend on the type of plastic and the specific requirements of your project.
Choose the Right Marker
Selecting a suitable marker is essential for ensuring that your writing stays on the plastic surface. Opt for a permanent marker with a good brand reputation. Avoid using old markers, as they may not produce crisp, long-lasting lines. Look for markers specifically designed for writing on plastic surfaces, as they will have the right type of ink formulation.
Remember, preparing the plastic surface is a crucial step in ensuring the durability and legibility of your writing. By following these steps, you can create a clean, smooth surface that will allow your markings to last for months or even years, depending on the wear and tear of the container.
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Choosing the right marker
Type of Marker
Look for markers that are specifically designed for writing on plastic surfaces. Permanent markers are often recommended for plastic as they are designed to be long-lasting. However, keep in mind that even permanent markers can fade over time on plastic and may need to be touched up or re-written. Expo markers, for example, offer low-odor wet-erase markers that can be used on plastic and glass containers and are easy to wipe off for re-labelling.
Marker Quality
It is worth investing in a good-quality marker to increase the chances of your writing staying put. While cheaper options may work, you may need to use more sealant to ensure the ink doesn't rub off. Opt for a newer marker, as older ones may not have the same ink flow and intensity as a fresh marker.
Surface Preparation
Before writing on the plastic surface, ensure it is clean and free of any grease or fingerprints, as these can cause the marker to rub off. Lightly sanding the plastic or using a flame to "burn" it can also help prepare the surface and increase the likelihood of the ink adhering.
Sealants
After writing on the plastic, consider using a sealant to provide extra protection and longevity to your writing. Clear nail polish or modge podge can be effective sealants for this purpose. If you're open to alternatives to markers, soldering irons or engraving tools can be used to etch plastic containers more permanently.
Surface Compatibility
Some markers work better on certain types of plastic surfaces. For example, Zebra Mackee Care Double-Sided Markers are designed to write well on the smooth plastic surfaces of zip-top bags. On the other hand, some markers may not work well with specific coatings on plastic surfaces, so it's important to test the marker on a small area first.
In summary, when choosing a marker for writing on plastic containers, opt for a high-quality permanent marker designed for writing on plastic surfaces. Prepare the plastic surface by cleaning and sanding if necessary, and consider using a sealant after writing. Additionally, keep in mind the specific type of plastic you are writing on and choose a marker that is compatible with that surface.
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Drying and sealing your writing
Preparing the Plastic Surface:
Before you begin writing on the plastic container, it is essential to prepare the surface properly. Start by cleaning the surface with a clean cloth or paper towel, ensuring it is free from dust, dirt, or any oily residue. This step is crucial, as grease or oil can cause your marker to not adhere properly and smudge easily. You can use soap and warm water to remove any stubborn grime. Once the surface is clean, ensure it is completely dry before proceeding to the next step.
Writing on the Plastic:
Use a good-quality permanent marker for your writing or design. Oil-based sharpie markers are an excellent choice, as they are resistant to water, smudging, and fading. They also dry quickly, reducing the waiting time. However, if your plastic container will be exposed to grease or oil, opt for regular permanent markers with alcohol-based ink.
Drying the Ink:
After you have finished writing or drawing your design, let the ink dry completely. Even with permanent markers, the ink can fade over time, so it is important to be patient and allow sufficient time for the ink to dry. This can take a few hours, so grab some leisure time while you wait!
Sealing the Writing:
To make your markings truly permanent and protect them from smudging, fading, or chipping, you will need to seal them. There are several options for sealants:
- Clear Nail Polish: Apply a coating of clear nail polish over the surface where you have written. This will help seal the marker writings and keep the surface dust-proof and smear-proof. It will also add a shiny finish to your work.
- Mod Podge: Mod Podge is a type of decoupage glue with a glossy finish. It seals in the ink and prevents smudging or bleeding through the plastic surface. It also provides protection against scratches and fading. You can brush it on top of your design and let it dry. Mod Podge comes in various formulations, such as matte, glossy, glitter, and super thick. For plastic surfaces, glossy and super-thick formulations are ideal, as they do not affect the appearance of the item.
- Resin: If you want to add extra shine to your work, consider using resin. It will make your markings even more permanent and secure. There are many YouTube tutorials available to guide you through the process of using resin.
- Varnish: You can use a light coat of varnish, such as Krylon's Kamar varnish, as an easy and affordable way to seal your work. It can be used on other materials like glass or metal as well.
Additional Tips:
- Sanding: Some people choose to lightly sand the plastic surface before writing to create a rougher surface for better ink adhesion. However, others opt out of this step as they feel it may damage the item. It is up to you whether you include this step.
- Curing: Depending on the type of ink used, you may need to cure the ink by exposing it to heat or ultraviolet light.
- Ink Compatibility: Ensure that you choose an ink compatible with the plastic material to ensure proper adhesion and durability.
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Using alternative writing tools
Permanent Markers
To ensure your writing stays on plastic containers, it is recommended to use a permanent marker. Look for a new marker with a good brand known for its quality. Before writing, prepare the plastic surface by cleaning it thoroughly with soap and water to remove any grease or fingerprints. You can also try sanding the plastic lightly to create a better surface for the ink to adhere to. Once you have written on the container, let the ink dry for several hours. You can then apply a coat of clear nail polish or a sealant like modge podge to protect the writing and make it last longer.
Flame Treatment
Another method to prepare plastic for writing is through flame treatment. This involves lightly passing a flame over the plastic surface to "burn" it without causing discolouration. You can use a candle or a small propane torch and quickly move it back and forth to avoid melting the plastic. After flame treatment, you can use a permanent marker to write on the treated area, and the ink should resist coming off.
Washi Tape
If you are concerned about ink shadows on plastic containers, consider using washi tape. You can write your labels on the tape and then apply it to your containers. This method ensures that your labels are removable and reduces the risk of permanent shadows.
Expo Markers
Expo markers are designed for writing on plastic and glass storage containers. They are low-odor wet-erase markers that allow for easy relabelling. You can simply wipe off the markings when needed and start fresh. Expo markers are perfect for organizing your kitchen and pantry with colour-coding and specific labels.
Pilot Markers
Pilot markers are also effective for writing on plastic containers. The Pilot Name Markers produce dark, highly readable lines and wash off easily with soap and water. On the other hand, the Pilot Oil-Based Twin Markers write clearly on various surfaces, including plastic, and resist condensation well. However, they may leave slight shadows on plastic containers, which can be reduced with rubbing alcohol.
Other Methods
Some other alternative methods for writing on plastic containers include using a soldering iron to etch the plastic, marking the lids with a knife blade or file, or wrapping the container with tape to adhere to itself. Additionally, you can explore laser marking services to engrave your plastic containers permanently.
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Removing and re-writing
Removing writing from plastic containers can be done in a few simple steps. One popular method is to use pure acetone, which can be sourced from nail polish remover. First, place the plastic container in a shallow tray to protect your work surface and prevent wasting acetone. Then, soak a washcloth in the acetone and place it over the areas with writing. Leave the cloth for around 60 seconds, then begin scrubbing. The ink should come off easily. If not, leave the cloth for a little longer. For stubborn marks, you may need to use a small amount of acetone directly on the writing and scrub it off.
Another method is to use a marker on a piece of blue painter's tape on the lid of the container. This method is quick, cheap, and avoids the need for scrubbing. You can also use low-odor wet-erase markers, such as EXPO markers, which can be easily wiped off and allow for flexible labelling.
Once the writing has been removed, you can rewrite on the plastic surface. It is important to prepare the plastic surface by cleaning it with soap and water, or alcohol, to ensure it is spotless. You can also lightly sand the plastic to create a smooth surface. Ensure the plastic is completely dry before writing on it. Use a good-quality permanent marker, preferably a new one, and write on the prepared surface. You can also oxidize the surface by passing it quickly over a small flame, being careful not to melt or discolour the plastic.
To ensure the writing stays on the plastic, you can use a sealant. Clear nail polish or modge podge can be used as a protective coat over the writing. This will help the ink last longer and prevent the need for frequent re-writing.
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Frequently asked questions
There are several ways to write on plastic containers, including using markers, tape, soldering irons, and laser markers.
You can use permanent markers, water-resistant pens, or food-safe pens and markers like EXPO Low Odor Wet Erase Markers. It is recommended to use a new marker and ensure the surface is clean and dry before writing.
To make the writing on a plastic container permanent, you can try oxidizing the surface by lightly passing a flame over it before writing. You can also use a sealant like clear nail polish or modge podge to protect the writing.
Some alternatives to writing directly on plastic containers include using tape, such as labeling tape or wash tape, or using a soldering iron to etch the plastic or create a code of dots. You can also explore laser marking or engraving services.
To remove writing from a plastic container, you can try using rubbing alcohol or soap and water. Some markers may leave slight shadows, especially after heating, which can be challenging to remove.
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