Print and Cure Parameters: Understanding the Impact

One user reported a two-color design (white and blue) on a T-shirt, cured at 180°C for 40 seconds. The issue surfaced when the garment was washed, leading to blue ink staining the white part of the design. Another user pointed out that the curing parameters, especially with the use of a retarder, might be contributing to the problem.

The Role of Retarder in Permaset Inks

Permaset inks contain a retarder, specifically glycerol, which does not evaporate quickly. To ensure proper curing, it's crucial to allow the retarder to cross-link and become an integral part of the ink. The recommendation was made to cure water-based inks at a lower temperature for a more extended period, emphasizing a "low and slow" approach.

Optimal Curing Conditions

The suggested curing temperature was reduced to 160°C for at least 3 minutes, challenging the conventional practice of 180°C for 40 seconds. The user argued that the lower temperature and longer curing time are more effective, especially when using a catalyst. Permaset inks, however, do not provide a catalyst option, leading to a need for customized curing conditions.

Adherence to Instructions and Experimentation

One user highlighted the importance of adhering to instructions, noting that the guidelines provided are not rigid rules. The debate around temperature variations and curing times ensued, with concerns raised about potential fabric damage at 160°C for 3 minutes. The consensus, however, leaned towards experimenting with curing times to find the optimal balance between ink curing and fabric preservation.

Retarder Usage and Additional Testing

It was clarified that the ink already contains a retarder, and adding more could increase curing time by 20%. Users were encouraged to conduct their tests, indicating a degree of flexibility in the curing process.

Insights from Other Users and Recommendations

Contributions from different users added valuable insights. One user shared their successful curing process at 340°F for 60 seconds, emphasizing the importance of using a heat press without lifting. This user also highlighted the necessity of flashing prints on press before moving to the heat press.

Recommendations

Troubleshooting ink transfer issues with Permaset Supercover inks involves a careful balance of curing parameters. While the standard guidelines may provide a starting point, users are encouraged to experiment with lower temperatures and longer curing times, keeping in mind the fabric's sensitivity. The presence of retarder in the ink should be considered, and additional testing is recommended to find the optimal conditions for curing without compromising print quality or causing ink transfer.

For more in-depth discussions and troubleshooting tips, consider following BCH Technologies' YouTube Channel and exploring their tech blog. If you're in the Greensboro, North Carolina area, local support may also be available.

Remember, each printing setup may have unique requirements, so a degree of experimentation is often necessary to achieve the best results.