Introduction
The screen printing process for Positive Heat Transfer Silicone Ink is critical to achieve high-quality, durable, and high-density prints on textiles. This guide explains the step-by-step procedure, including recommended silicone materials, layering, curing, and heat pressing parameters. Following this workflow ensures consistent results and minimizes common printing problems.
Process
Step 1: Base Layer Printing
For the base layer, use XG-360R-2N / XG-360R-2 silicone adhesive. Apply a thickness of 0.1-0.15 mm using a standard screen printing technique. This layer provides strong adhesion to the substrate and serves as the foundation for subsequent layers.
Step 2: Intermediate Layer
Mix XG-360Z-3X with XG-866B-2 at 5%-7%. Print this intermediate layer 2-3 times to gradually build thickness and enhance elasticity. This layer improves the bonding between the base and top layers while maintaining flexibility.
Step 3: Top Layer and Color Addition
Prepare the top layer using XG-866A-2Y / XG-866AH, adding 2% XG-866B-2 to increase thickness. Incorporate color paste at 10%-30% depending on the desired visual effect. Apply this layer with precision to ensure a uniform finish and optimal high-density silicone effect.
Step 4: Oven Curing
Cure the printed layers in an oven at 100°C–120°C for 30–50 minutes. Proper curing is crucial to achieve full crosslinking of the silicone layers and to maintain elasticity and adhesion for the subsequent heat transfer process.
Step 5: Heat Transfer Pressing
Combine the printed silicone layers with the substrate using a heat press at 170°C for 20 seconds, following the positive transfer process. This step ensures a permanent bond between the silicone ink and fabric, creating durable, high-density, and visually appealing prints suitable for apparel applications.
Summary
Following this screen printing process for Positive Heat Transfer Silicone Ink ensures:
- Strong adhesion and flexibility
- High-density, 3D visual effects
- Reduced printing defects
- Long-lasting performance for various textile applications
FAQ
Q:1.What is it?
A:It is a type of silicone ink printed onto PET transfer film first and then heat pressed onto fabric. It allows precise thickness control, strong adhesion, and consistent high-density effects compared to direct printing.
Q:2.Why is multi-layer screen printing required for it?
Multi-layer printing helps build thickness gradually, improve elasticity, and enhance bonding between layers. This process reduces cracking, improves wash resistance, and ensures stable performance during heat transfer.
Q:3.What curing temperature is recommended before heat transfer?
For positive heat transfer silicone ink, oven curing at 100–120°C for 30–50 minutes is recommended to ensure proper crosslinking before final heat pressing.
Q:4.What heat press conditions are suitable for positive heat transfer?
A heat press temperature of 170°C for about 20 seconds is commonly used. Proper pressure and time ensure strong adhesion between the silicone ink layer and the fabric.
Q:5.Can color paste be added to heat transfer silicone ink?
Yes. Color paste can be added at 10%–30%, depending on the desired color strength and visual effect, while maintaining elasticity and durability.
Q:6.What fabrics are suitable for positive heat transfer silicone ink printing?
It is widely used on cotton, polyester, blended fabrics, and elastic textiles, especially for apparel requiring high-density logos and durable finishes.
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