Sofia Martinez
Shrink plastic is a versatile craft material that can be used to create a variety of projects, from jewellery to accessories and charms. It is available in different colours and opacities, including clear, white, and black. The plastic shrinks to approximately 45% of its original size, so designs must be larger than the desired end product. Before shrinking, the plastic can be coloured with sharpies, markers, pencils, chalks, or paint. To shrink the plastic, you can use a toaster oven, a regular oven, a heat gun, or an embossing heat tool. The most common brand of shrink plastic is Shrinky Dinks, but other options include PolyShrink and generic shrink plastic sheets. When choosing the best shrink plastic for your project, consider the type of plastic, the desired colour and opacity, the shrinking method, and the availability of the material.
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What You'll Learn
Types of shrink plastic
Shrink plastic is a versatile craft material with various types and brands available. It is a sheet of polystyrene plastic that shrinks and thickens when heated, making it ideal for creating jewellery, keychains, charms, and other accessories. The shrinking process can be done in a toaster oven, regular oven, or with a heat gun, and the amount of shrinkage can vary depending on the type of plastic and heating method.
One of the most popular brands of shrink plastic is Shrinky Dinks, which offers a range of sheets in different colours, including clear, white, and black. These sheets can be cut, coloured, and shaped before shrinking, allowing for creativity and experimentation. Some crafters also use clear plastic from food packaging, specifically polystyrene with a "6" designation, as it is safe to shrink in the oven.
When it comes to colouring shrink plastic, various options are available, including markers, coloured pencils, chalks, and ink jet printers. It is important to note that the colours become more intense after shrinking, and any holes for hanging or attaching findings should be punched before shrinking. Clear coating the plastic after shrinking can also help protect the colours and prevent smudging.
In addition to Shrinky Dinks, another popular brand is PolyShrink, which offers a similar range of sheets for crafting. The choice between brands may depend on personal preference and the desired effect, as some crafters find that certain brands shrink more evenly or provide better results with specific colouring materials.
Beyond the craft-specific shrink plastic brands, there are also industrial-grade shrink films available, such as PVC, Polyolefin, and Polyethylene. These films are typically used for packaging and have different characteristics in terms of clarity, strength, temperature resistance, and recyclability. While these industrial films may not be as commonly used for crafts, they can be sourced and experimented with to create unique shrink plastic projects.
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How to colour shrink plastic
Shrink plastic is a versatile material that can be used to create a variety of crafts and accessories. It is a form of plastic that shrinks to a fraction of its original size when heated. The best type of ink to use on shrink plastic is pigment ink and permanent ink such as Stazon. However, keep in mind that not all inks perform the same on all brands of shrink plastic. Markers, inks, pencils, and acrylic paint can be used to colour images on shrink plastic before shrinking.
Before colouring shrink plastic, it is important to prepare the surface by lightly sanding it with sandpaper. This will create a rough surface for the ink to grab onto and help the colours appear more vibrant after shrinking. It is also recommended to test on a small piece of plastic first, as the precise shrinkage may vary depending on the brand of shrink plastic used.
When colouring shrink plastic, it is best to use a shade or two lighter than the desired shade, as the colours will become deeper and more saturated during the shrinking process. It is important to remember that the plastic will shrink approximately 45% of its original size, so designs should be larger than the desired final size. Markers, pencils, chalks, and acrylic paint can be used to colour the plastic, with markers and pencils being the most popular choice.
When using markers, it is recommended to trace the design with a marker and then colour it in with permanent markers. Contrasting colours tend to produce the best results. If using pencils or chalks, it is important to remember that they will appear very light before shrinking, but the colours will blend and become bolder during the shrinking process.
After colouring the shrink plastic, it can be heated using a heat tool, a toaster oven, a regular oven, or a hairdryer. It is important to keep an eye on the plastic during the shrinking process, as it will curl and bend before flattening back out. Once it has finished shrinking, the plastic should return to a flat shape.
To ensure that the colours do not smudge or bleed, it is recommended to apply a clear coating after shrinking. This can be done using sprays, clear nail polish, or embossing powder. Additionally, if using blue ink, it is recommended to use a protective coat of clear nail polish or super glue to prevent smudging.
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How to cut shrink plastic
While there are several brands of shrink plastic available, the most common is Shrinky Dinks. PolyShrink is another popular option.
Now, onto cutting shrink plastic. Here's a step-by-step guide:
Preparing the Plastic:
Before cutting, it's essential to prepare the plastic sheet. First, decide on the colour of plastic you want to use. Clear, white, and black are standard options, but other colours are also available. Choose a colour that complements your design and the intended purpose of the final product. Once you've selected your plastic sheet, lightly sand all the areas you plan to use. This step helps the ink or paint adhere better to the plastic surface.
Drawing and Tracing:
Before cutting, you can draw or trace your design directly onto the plastic. Freehand drawing works well, especially on solid-coloured plastic. If you're using black plastic, keep your design simple, as intricate details might be challenging to execute. You can use markers, pencils, or chalk for drawing. Remember that the colours will become more intense after shrinking, so you don't need to apply excessive pressure or layer too much colour.
Cutting Techniques:
When cutting shrink plastic, it's essential to use sharp scissors or a craft knife. Smaller scissors are preferable when dealing with delicate edges or intricate shapes. Carefully cut out your design, being cautious around intricate details and curves. If you're creating jewellery, use a hole punch to create a hole for attaching jump rings, strings, or wires. It's crucial to make any holes before shrinking the plastic, as drilling into the shrunk plastic can be challenging and may lead to cracking.
Finalising the Design:
After cutting out your design, you can finalise the details. If you're using clear plastic and want a contrasting design, cut and glue a piece of paper to the back of your piece. You can also add stamps or print on the plastic using an inkjet printer for consistent, small shapes. Remember to consider the shrinkage rate of the plastic, which is approximately 45% of its original size, so your design should be significantly larger than your desired final size.
Shrinking Process:
Once you're happy with your design and have cut it out, it's time to shrink the plastic. You can use a toaster oven, a regular oven, a heat gun, or an embossing heat tool. Set the temperature between 350-375 degrees Fahrenheit. Place your plastic directly on a tray, or use parchment paper or aluminium foil to protect the surface. During the shrinking process, the plastic may curl up, but don't be alarmed—this is normal, and it will flatten back out. If the edges stick together, gently pry them apart with pliers or forks and continue heating until it flattens.
Post-Shrinking Steps:
After shrinking, let your plastic piece cool down. If you used permanent markers, especially blue ink, consider applying a protective coat of clear nail polish or super glue to prevent smudging. You can also spray your piece with a clear coat or use embossing powder to prevent colours from bleeding or smudging.
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How to shrink plastic
Shrink plastic is a thin and flexible piece of plastic that shrinks down to 1/3 to 1/5 of its original size when exposed to heat. It comes in many colours and sizes, and it is possible to use coloured pencils, crayons, markers, chalks, and ink to draw on the plastic.
To shrink plastic, follow these steps:
- Draw your design on the shrink plastic: Keep in mind that the plastic will shrink in the oven, so make your design a little larger than you want the finished result to be. You can draw from your imagination, or print out an image from the computer and place it under the plastic to trace.
- Cut out your design: If you want, you can also make a hole at the top with a hole punch. This will be useful if you want to hang your design or attach charms.
- Preheat your oven: Preheat your oven to 130 degrees Celsius and place your shrink plastic on a baking sheet lined with parchment paper. Make sure the coloured side is facing up.
- Bake your plastic: Place the baking sheet in the oven and bake for 3-4 minutes. The plastic will curl up, but don't worry, it will straighten out.
- Remove and flatten: After baking, remove the plastic from the oven and let it cool. If your plastic is slightly bent, you can carefully flatten it out, but be careful as it will be very hot.
Some additional tips for working with shrink plastic:
- It is recommended to colour the plastic before shrinking. The colour will get more intense as the plastic shrinks.
- Punch any holes in your piece before shrinking, as trying to do it afterwards can cause the plastic to crack.
- If using markers, outline your design with a sharpie and then use coloured pencils on the rough side. If you make a mistake with the sharpie, you can remove it with rubbing alcohol.
- If using coloured pencils, lightly sand one side of the plastic to allow the pencil to stick better.
- If using blue ink, add a protective coat of clear nail polish or super glue, as it tends to smudge.
- Apply a clear coating after shrinking to prevent colours from bleeding and smudging. You can use sprays, clear nail polish, or embossing powder.
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How to finish shrink plastic
Shrink plastic is a fun and simple craft that can be used to create a variety of projects, such as charms, jewellery, keychains, and accessories. It is a thin and flexible piece of plastic that shrinks down to around one-third to one-fifth of its original size when exposed to heat, making it perfect for creating mini artworks and gifts. Here are some detailed instructions on how to finish shrink plastic:
Planning and Preparation:
Before you start crafting, it is important to plan your design and gather the necessary materials. Decide on the shape and size of your project, keeping in mind that the plastic will shrink by approximately 45%. Draw or trace your design onto the plastic, using a marker or pencil. If you want to add colour, it is recommended to use permanent markers, sharpies, or coloured pencils. You can also experiment with chalks, crayons, or stamp ink. Remember to make your design bolder than you think is necessary, as the colours will intensify after shrinking. If you want to add any holes for hanging or attaching charms, use a hole punch before shrinking the plastic.
Baking and Shrinking:
Preheat your oven to the temperature specified on the shrink plastic packaging. Place a piece of cardboard or cooking paper on an old tray and place your cut-out plastic design on it. The glossy side should be facing down, with the rough, matte side up. Shrink plastic can be shrunk in a toaster oven, regular oven, or with a heat gun or embossing heat tool. A hair dryer is generally not hot enough. If using an oven, heat it to around 350-375 degrees Fahrenheit. You can put your plastic directly on the tray, but using parchment paper or aluminium foil will protect the surface and allow you to slide the plastic off before it cools.
Final Touches:
Once your plastic has shrunk and flattened, remove it from the oven and let it cool. If your plastic has curled, don't worry—this is normal, and it will straighten out. If the edges stick together, gently pry them apart with pliers or forks and continue heating until it flattens. After your piece has cooled, you can add any final touches. If you used coloured pencils or chalks, you may want to apply a clear coat of nail polish or spray to prevent smudging. If you used blue ink, add a protective coat of clear nail polish or super glue to prevent smudging.
With these steps, you can create beautiful and unique shrink plastic crafts. Remember to experiment with different colours, techniques, and designs to find what works best for you.
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Frequently asked questions
The best type of plastic for shrink crafts is polystyrene with the #6 recycling code. This type of plastic is safe to shrink in the oven and can be sourced from food packaging. It is important to look for the #6 code to ensure safety.
There are several ways to colour shrink plastic, including markers, pencils, chalks, and ink jet printers. It is important to note that blue ink tends to smudge, so a protective coat of clear nail polish or super glue is recommended. The colour will become more intense after shrinking, so it is not necessary to make it very dark before shrinking.
There are several ways to shrink plastic, including using a toaster oven, a regular oven, a heat gun, or an embossing heat tool. It is important to heat the plastic evenly to avoid warping and curling. The plastic will shrink by approximately 45%, so it is important to make the design larger than the desired final size.
