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Scorching is a common issue among screen printers and often they are not careful and a few screens get damaged due to overheating. However, preventing your screen prints from scorching is easier if you follow a few steps. In this blog, we have laid a set of few steps to help you determine how much heat your screens need.

Overheating can leave a brown or yellowish scorch mark on your garments, especially visible if it’s a light-colored garment. Carefully applying heat to the screenprints can help you prevent scorch marks by setting-up proper equipment, monitoring and quality control in your print shop.

Set Aside Finer Substrates That are More Likely to Scorch

To prevent scorching of screen prints you have to first find out the substrates that are delicate and more likely to get scorches. Most light-colored garments such as white and light grey show up scorch mark pretty easily. Light-weight cotton fabrics also get scorched easily. On top of that, some synthetic fabrics scorch with a little more heat above its tolerance level. They get scorched more easily than their cotton counterparts.

Time to Adjust Your Conveyor Dryer

Some screen printers run the screen prints through a conveyor dryer the same way without fine-tweaking for each substrate. In order to prevent scorching on fabrics, you will have to adjust the settings for its heat and speed on the conveyor dryer.

When you have a delicate fabric that is prone to scorching you should run it through the conveyor dryer at a lower temperature and for a longer period of time.

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Adjusting the Flash Cure Unit

Overheating the fabric in flash cure units is the most common reason among screen printers for scorched fabrics. When dealing with lighter fabrics or delicate substrate you should lower the temperate and adjust it likewise for different types of fabrics. You should also raise the height of the unit so that the substrate is farther from the pallet when the ink cures.

Using Specialty Inks

Sometimes you would need specialty inks to prevent scorching. If regular plastisol ink on synthetic fabrics scorches easily, then you should use specialty inks that cure at a lower temperature.

Carefully Monitor Temperatures

All industrial conveyor dryers and flash cure units come with temperature controls to enable fine-tune or adjust the temperature and exposure time depending on the substrate. These controls are perfect for customizing your cure unit for each print job but in order to prevent any scorching, you have to monitor and keep a close eye on the temperature on the conveyor. You should know that the longer it runs the hotter it gets in the dryer under the flash. Also depending on the humidity and room temperature, it could affect your print curing. You should monitor the temperatures with a temperature gun.

Finally Removing Scorch Marks

On the flip side if your tees do get a scorch mark you don’t necessarily have to toss it into the trash. There are some ways to fix the issue and remove the scorch marks. You can easily treat the white garments with a mixture of hydrogen peroxide and water or just give it a wash in the washing machine. You could also spray the marks with commercial solutions for the job.

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Nearly all screen printing shops have to deal with scorched tees once in a while. Learning more about the curing temperature and time for each garment type can really help you get around the problem.

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