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By Steve Baker | Aug 11, 2017
Printed electrodes are often used for electrochemical test strips and devices.

This blog is the first in our new series on technical printing. Throughout this series, we will describe the procedures involved in creating technical printing solutions, from start to finish. To begin, this blog will focus on defining what technical printing is and what it’s used for.

Technical printing is a generic term used for functional printing projects that fall outside of industry standards, materials, processes, and specifications. These projects require extremely tight tolerances and critical product specifications, typically belonging to highly regulated industries, such as the medical industry. The processes follow current Good Manufacturing Practices (cGMP), which are regulations enforced by the FDA to ensure products are consistently produced and meet quality standards. Technical printing and functional printing are both used for similar applications, such as for membrane switches. However, they differ in that functional printing has more forgiving specifications and technical printing has much tighter specifications.

A common example of technically printed parts is printed electrodes, which are strips manufactured for electrochemical analysis. This involves technical printing because they are typically used in the highly regulated medical field, in applications such as diabetic test strips. When manufacturing printed electrodes, conductive lines are finely printed in great detail on polyester substrates, typically using conductive inks including carbons, silvers, and silver-silver chlorides.

With technical printing, applying a conductive ink to a surface is similar to how you would apply frosting to a cake. When you squeeze a bag of frosting, a controlled amount comes out of an opening at the end. This same process is how conductive inks are applied as circuit lines on polyester substrates during technical printing.

GMN frequently manufactures electrodes for electrochemical test strips and devices, such as diabetic test strips or quick diagnostic labs. GMN prints electrodes with silver, carbon, or various conductive inks in order to measure a current or other signal. Our customers will then apply a reagent on top of the electrodes. When those reagents are exposed to bodily fluids such as blood, a chemical reaction takes place, and the electrodes will detect that reaction and send the signal to the device it is powered to. This is done on a very small scale, and the readings of signals must be completely accurate, which is why this part requires technical printing with a high degree of scrutiny. Because it has such a small trace, you can’t afford to have large variances in the circuit itself, which is why the tighter tolerances are so necessary.

Many variables go into technical printing projects, such as the curing times and quality of inks, as well as the substrates and thicknesses used. These variables are controlled closely, especially when making electrodes for medical equipment. These parts go on very important equipment and could mean life or death in certain situations, such as buttons for a medicine administration device used for hospital patients or printed electrodes used in diagnostic labs for diseases. With years of experience in the medical industry and other highly regulated industries, GMN is a trusted manufacturer for technical printing projects.

Our next blog will explore the development of technical printing projects. For more information on printed electrodes, click here

Anna Minzel, GMN
By Anna Minzel | Jul 26, 2017
Magni-lens doming can increase the life of a nameplate tenfold

GM Nameplate (GMN) worked with Elkhart Plastics to create a nameplate for one of their products: Kong Coolers. After several months of back-and-forth communication, GMN and Elkhart Plastics went from a rough design of the logo to the finished part that is now being manufactured and placed on all Kong Coolers.

Elkhart Plastics had a list of things they wanted for their part, but some ideas were too intricate to manufacture and wouldn’t fit their budget. However, GMN’s knowledgeable team knew how to achieve the desired look the client wanted. GMN’s wide set of capabilities allowed for all of the different processes required to make this nameplate to be done under one roof: embossing the base layer, screen printing the various logo colors, and affixing the urethane dome (Magni-lens).

Kong Coolers are positioned as one of the most durable coolers in the market and are built for harsh environments. That being said, the nameplate required for this cooler also needed to be durable. The initial design had an aluminum base to achieve a metallic look. However, there was concern for the first design of the nameplate: the adhesive on the embossed regions of the nameplates wasn’t touching the cooler, which left a little amount of surface area to adhere to the cooler.

GMN solved this issue by using silver Mylar instead of aluminum. Silver Mylar is a much more flexible material, so the embossed regions were able to make contact with the cooler. Silver Mylar still gave the logo a metallic look, but was a less expensive option that already came with an aggressive adhesive on the back.

To increase the logo’s durability, GMN applied a Magni-lens layer to the nameplate. Magni-lens is a clear urethane dome that is capable of tremendous impact resistance, while still maintaining a modern look. With the stronger adhesive and the domed urethane cover, this nameplate can survive anything Kong Coolers can survive.

GMN helps customers with design considerations for manufacturability to create superior products. With years of experience, our team knows the best processes to accomplish desired aesthetics while producing the part as economical as possible. In addition, we are able to get samples out quickly for testing to ensure they have the highest degree of quality before going into full production.

For another example of a Magni-lens cooler nameplate, check out this previous blog.