Why is my black sublimation turning green?

If you have noticed that your black sublimation is turning green, you may be wondering why this is happening. There are several factors that can cause this color change, including improper printing techniques, low ink levels, incorrect temperature settings, or a chemical reaction between the sublimation ink and the substrate. Understanding these factors can help you troubleshoot and prevent your black sublimation from turning green.

Improper Printing Techniques

One possible reason for your black sublimation turning green is using improper printing techniques. This could include insufficient pressure during the heat press process, using the wrong sublimation paper, or not properly pre-pressing the garment. It is crucial to follow the manufacturer’s instructions and use the recommended printing techniques to ensure color accuracy and prevent color distortion.

Low Ink Levels

Low ink levels in your sublimation printer can also contribute to your black sublimation turning green. When ink levels are low, the printer may not be able to deliver the proper amount of ink to produce a deep black color. It is essential to regularly check and refill your ink cartridges to maintain the desired color intensity.

Incorrect Temperature Settings

Temperature plays a significant role in the sublimation process. If the heat press temperature is too low, the sublimation ink may not fully transfer onto the substrate, leading to color distortion. Conversely, if the temperature is too high, it can cause the ink to vaporize too quickly, resulting in incorrect color development. It is crucial to find the optimal temperature settings for your specific sublimation ink and substrate combination.

Chemical Reaction

In some cases, a chemical reaction between the sublimation ink and the substrate can cause a black sublimation to turn green. This can occur if there are impurities on the substrate’s surface or if the substrate contains chemicals or coatings that react with the ink. Conducting thorough substrate testing before starting the sublimation process can help identify any potential chemical reactions and allow for proper adjustments.

Environmental Factors

Environmental factors can also contribute to the color change in sublimation. Exposure to excessive humidity or UV light can cause the sublimation ink to degrade and change color over time. It is essential to store sublimated products properly and avoid exposing them to harsh environmental conditions that could affect the ink’s integrity.


When troubleshooting why your black sublimation turns green, consider factors such as improper printing techniques, low ink levels, incorrect temperature settings, chemical reactions, and environmental factors. By understanding and addressing these potential issues, you can maintain the desired black color and ensure consistent and high-quality sublimation results.