Water-based ink printing on polyester-viscose blends can be a challenging task due to the delicate balance between curing the ink and avoiding fabric damage. In this overview, we'll explore the temperature considerations, curing recommendations, and low-cure additives to ensure your custom job on 40 shirts turns out flawlessly.

Understanding Temperature Sensitivity

The first concern when heat setting on polyester-viscose blends is the fabric's sensitivity to high temperatures. To prevent the shirts from melting or deforming, you might be inclined to lower the curing temperature. However, this can lead to incomplete ink curing, creating issues down the line.

Curing Recommendations by Ink Brand

To determine the ideal curing temperature, it's crucial to consult the recommendations provided by the ink brand you're using. Different water-based ink formulations may have varying curing requirements, and adhering to these guidelines is essential for achieving long-lasting and vibrant prints.

The Low-Cure Additive Solution

If you're looking to cure your water-based ink at a lower temperature without compromising ink quality, low-cure additives are the answer. These additives are designed to reduce the curing temperature while maintaining ink integrity. However, keep in mind that once added to the ink, the mixture has a limited pot life.

One common issue with polyester-viscose blends is dye migration, especially with higher polyester content. The low-cure additive is an effective way to address this problem. By lowering the curing temperature, you can minimize the risk of dye migration and maintain print quality.

Exploring Low-Cure Additives

1. Ryonet's Warp Drive vs. Total Ink Solutions' The Drive: Ryonet's Warp Drive and Total Ink Solutions' The Drive are two popular low-cure additives in the market. They both serve the same purpose and offer similar results. The key distinction is the price, with Total Ink Solutions' The Drive being a more budget-friendly option. These additives can lower the curing temperature to as low as 180°F, but a temperature around 250°F is often recommended. Once mixed into your ink, it has a 24-hour shelf life, although refrigeration can extend its usability to several weeks.
2. Matsui's Fixer WF-N: Matsui offers another low-cure solution with their Fixer WF-N. This additive can lower the curing temperature to 300°F and has the advantage of an unlimited pot life, making it a convenient choice for those who want extended flexibility in their printing process.

Balancing Curing Temperature and Fabric Integrity

It's important to remember that polyester-viscose blends, when exposed to temperatures above 280°F, can trigger dye migration. This can result in colors bleeding and compromising the final print. While 100% cotton fabrics are more forgiving in this regard, blends and viscose fabrics require special attention.

When working with water-based ink on polyester-viscose blends, finding the right curing temperature is essential to achieve a successful print job. While low-cure additives are a valuable tool to lower the temperature and mitigate dye migration, it's crucial to follow the recommendations of your ink brand and be mindful of the fabric's sensitivity to heat. By striking the right balance, you can ensure that your prints not only look fantastic but also stand the test of time.

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