Originally published on fastradius.com on July 13,
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Hot stamping is a lithography printing process that uses heated image molds or stamping dies to transfer metal foils or pre-dried inks onto a surface.
Typically, the process works as follows: the hot stamping machine heats an engraved mold or die, which then presses marking foil onto the surface. The foil is deposited only where the hot stamp comes in contact with the product material, allowing engineers to create elegant, embossed designs on parts and assemblies in post-production. Hot stamping foils have three layers: a color layer (which can be pigment or metallic), an adherence base, and a release layer. Innovations in digital printing even enable hot stamping three-dimensional images with holographic foil.
Hot stamping is a versatile, precise, and efficient method for printing on surfaces, and is often used to personalize or decorate products. Here's a quick rundown on some of the key benefits of the hot stamping process, as well as key considerations to keep in mind.
One of the most significant advantages of hot stamping is that it can be used to treat a wide range of common product materials ' including plastics, rubbers, and metals ' in addition to more specialized materials like wood, leather, and glass. Hot stamping foil can even be applied to coated objects without damaging the coating. As such, it can be effectively applied to parts ranging from pencils and book bindings to cosmetic packaging and cable ties.
Hot stamping is also a clean and incredibly effective process. Because hot foil stamping machines work with rolls of metal foil or pre-dried inks, engineers can avoid mixing liquid inks and cleaning up messy spills.
Hot stamping also consistently produces high-quality results ' regardless of the pigment or metallic coloration of the foil, adherence bases are created to have a strong grip on product surfaces. However, some materials ' such as leather ' require specialty foils in order to properly adhere, which is important for product managers to keep in mind.
While marking foils are designed to be durable, environmental conditions can cause them to fade over time. In instances when a metal die is pressed into plastic or wood parts, the die can actually brand the material, ensuring that a mark remains even if the foil wears away.
Though primarily used as a finishing process, the hot stamping method has other applications, as well. For instance, in automotive manufacturing, hot stamping can be used to maximize steel malleability. The process is similar to warm forming; however, the dies are cold when pressed into the heated steel, which creates Martensite microstructures in the steel that give the part exceptional strength. This makes hot stamping useful in the production of strong vehicle cabins and safety cages, among other parts.
The one significant limitation of the hot stamping foil manufacturing process is that it does not allow for printing extremely small letters without losing definition. Otherwise, so long as the design can be made into a mold or die, it can generally be used to transfer stamping foil without issue. If high-definition small lettering is required, pad printing or screen printing may be more suitable options.
Another key consideration is the choice of material for the die that presses the stamping foil. Metals like brass, copper, magnesium, and steel are commonly used. Magnesium dies are easiest and least expensive to make but are less durable. Copper and brass offer greater durability and require greater costs to produce, while hardened steel dies are virtually indestructible and provide the best foil transfers. Steel dies are expensive to produce, but due to their durability, become incredibly cost-effective when used in high-volume production runs.
Hot stamping products that feature complex shapes or surfaces that aren't perfectly flat presents a challenge. However, manufacturers often overcome this hurdle by using silicone-based stamping dies. Because they are inherently softer than metal stamps, silicone dies conform better to irregular surfaces or shapes, which enables more precise transfers.
Ultimately, hot stamping is an effective means by which to customize or embellish parts, or to increase the malleability of materials such as steel. In any case, the process is versatile and relatively simple.
Product teams hoping to leverage hot stamping in their next project should look no further. SyBridge works to expand the boundaries of what's possible with modern manufacturing. Our team of engineers and designers work closely with every customer during each stage of the production lifecycle ' from design to post-production finishing. We create more than parts ' we build trusting partnerships focused on manufacturing superior components and assemblies on-time, every time. We can even update legacy products using newer, innovative manufacturing methods. Contact us today to start your next product run.
Have you ever wondered how some packaging gets its golden shine?
Or what gives some custom boxes a classy and elegant look that others are missing?
Foil stamping might be the answer you've been looking for.
What is Foil Stamping?Foil stamping, also known as hot foil stamping or foil printing, is a printing technique where foil is applied to another material to achieve a desired aesthetic finish. Similar to embossing or debossing, foil stamping applies both heat and pressure to create unique printed designs.
Foil stamping is a unique printing process where heat, pressure, foil and metal come together to create unique designs and optical effects.
The foil can be any color, but usually metallic foils, like gold and silver are used. Foil rolls, like paper, are available in matte and glossy finishes.
The foil stamping process has its roots in ancient Egypt, where gold was beaten with a hammer until it was extremely thin, and then applied to papyrus to add luster.
As you might imagine, this process was labor intensive and only reserved for the highest quality written records. Even throughout the beginnings of recorded history, things like gold leaf were typically reserved for royal or religious texts.
After the invention of the printing press, foil stamping used hand-set lettering or dies that were custom engraved. Because the process was so evolved, foil stamping was only used for book covers and literary works.
For example, if you wanted to print gold text on a book cover, you had to use separate fonts that used brass or lead type and then assemble the text by hand, one letter at a time, on a custom-engraved die. Once the text and the die were assembled, it was fed into the press which then printed the metallic foil sheets stamped into the book cover.
Modern foil printing came about in the early s. In Berlin, a master bookbinder developed hot-stamping foils in the late s. In England, atomized gold was used on thin sheets of polyester film. The popularity continued well into the s and s.
Commonly known as hot foil stamping, foil stamping is similar in technique to letterpress and engraving, where pressure is used to apply color to paper.
When the design is finalized, metal plates are created for each individual color foil in the shape that's needed. Then, the dies are heated. Pressure is applied to seal the foil to the paper or packaging material and then the press is run multiple times to apply each color individually.
If you want a raised or embossed effect, another die may be used to create that look to finish up the project.
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As you begin to explore the idea of using foil stamping in your printing, consider how your decisions about matte or gloss lamination, embossing and debossing and UV coating will influence the overall appearance of your packaging.
There are several different types of foil that can be used to give different optical effects to the packaging, including:
When you think of foil stamping, this is likely the type of foil you're thinking of. Metallic foil, also known as metalized foil, makes your text or area have a shiny, metal-style look. It's great for adding a touch of luxury, especially through the use of gold or silver foil as a finish.
Pigment foil is similar to metalized foil, but does not have the metallic look. They are available in a wide range of colors and are available with matte or glossy finish, which can make them undoubtedly eye-catching or add a touch of luxury and softness
These types of holographic foils create a sort of rainbow effect in 3D. You've seen this type of foil at work in collectibles like baseball cards or other trading cards, or even on promotional materials.
Other types of foil ' such as pearl foil, effects foil and scratch-off foil ' are less commonly used, but have well-known use cases, such as wedding invitations or lottery tickets.
Traditional Foil StampingNow that you understand the different types of foil stamping, it's time to move on to the actual methods involved.
Foil stamping can be done in two ways ' traditional foil stamping or digital foil stamping.
With traditional foil stamping, the design is edged onto a metal plate. This metal plate is similar to a regular die, except its particular use is for foiling. It's similar in function to a rubber stamp. The die is headed and a layer of the foil you want to use is placed between the die and the surface below it. The die is then pressed down onto the surface which causes the foil to bond to it in the shape of the design that was on the metal plate.
For designs that use several types of colors of foil, foiling dies need to be created for every color and the packaging material has to run through the machine several times (one for each color) so that the final design can be produced.
It's also possible during this time to apply other effects to the foil stamping such as an embossed edge or a raised look so that the finished product stands out even more, not just visually, but with a tactile sense as well.
Also called digital foiling, digital foil stamping follows a similar process as traditional foil stamping, but rather than using pressure to bond the design to the product packaging design with a metal die, a digital printer uses a specific type of foil that adheres to the surface of the design. This means that there's no need for multiple passes of the material into the printer for packaging design that uses several foil colors or patterns.
One particular method is not necessarily better than the other since both can be used to create the type of effects that you want on your packaging. Should you have questions about the specific intricacies of different foil stamping processes, we'd be happy to elaborate and guide you on the one that's right for your needs.
Benefits of Foil StampingFoil stamping offers a number of benefits for your retail packaging.
First, your product packaging will most assuredly stand out from the competition. Metallic foil or colored foil adds a touch of eye-catching brilliance and beauty to any package and gives it a luxurious style.
Combine that with other effects like raised or embossed designs and you can see how the packaging can take on a whole new level of sophistication.
In addition, foil stamping is versatile. It's not just reserved for metallic lettering, although that is one of the most common options. In addition, hot foil stamping is durable and resistant to moisture and scratches. It can be used on different types of stock (think corrugated boxes or folding carton boxes) and still retain its luster.
Hot foil stamping is a great way to stand out and add a touch of elegance, with either bright and eye-catching gloss, or more subdued with matte style foil stamping.
If you love the allure and uniqueness of hot foil stamping and you're interested in using this time-honored tradition to add refinement to your packaging, contact us today for a free, no obligation quote and consultation.
At Refine Packaging, our experts have years of experience and know-how in creating a wide variety of packaging products that leverage many different types of foil stamping and printing to ensure that your product packaging perfectly captures and conceptualizes your brand, your message and so much more.
Let us put our extensive experience to use in helping you magnify your product packaging with exquisite hot foil stamping and many other types of printing to captivate and compel your audience to buy. Rely on our expertise in helping thousands of brands large and small with all of their product packaging needs.
Not sure what type of design you need? Check our packaging glossary of terms and ask away. We have a variety of talented artists on-staff that can perfectly capture your vision and what you want your brand to convey to your target audience. Contact us today to learn more about working together and let us show you the power of premium packaging.
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