Burnt-out printing is a sophisticated technique that creates beautiful, semi-transparent patterns on fabrics, particularly those with a blend of cellulosic fibers (like cotton) and synthetic fibers (like polyester). The process relies on carefully selected chemicals to selectively degrade one fiber type, leaving the other intact. For professionals and enthusiasts alike, understanding the nuances of this technique is key to achieving flawless results. This guide, presented by NINGBO INNO PHARMCHEM CO., LTD., delves into the essential aspects of mastering textile burnout printing.

The core of successful burnt-out printing lies in the chemical formulation. A high-performance burnt-out printing paste, when combined with appropriate auxiliaries, ensures precise degradation of the target fibers. The article 'High Performance Burnt-out Printing Paste for Textile Burnt-out Printing' from NINGBO INNO PHARMCHEM highlights a robust three-component system: the primary burnt-out printing paste (MF-65), burnt-out powder (MF-20), and an anti-scorch agent (MF-15). This system is engineered to provide excellent penetration and uniformity, crucial for intricate designs.

When looking to buy burnout printing chemicals, it's important to consider the specific fabric blends. For cotton and polyester blends, the aim is to remove the cotton fibers without affecting the polyester. The MF-20 burnt-out powder plays a vital role here, releasing acid during the heat treatment phase to carbonize the cotton fibers. The correct dosage of this powder is critical; too little results in incomplete burnout, while too much can lead to excessive acid, blackening, and control issues.

Achieving the desired effect also depends heavily on the baking temperature and time. The recommended baking range is typically 120-140°C for 1-2 minutes. However, precise control is paramount. Over-baking can cause the fabric to blacken and become difficult to clean, while under-baking will leave the patterns incomplete and non-transparent. The MF-15 anti-scorch agent is designed to mitigate these risks. It helps inhibit over-burning and improves the efficiency of washing off the carbonized fibers. Adjusting the dosage of MF-15 based on baking temperature and time is a key strategy to fine-tune the process. For instance, if higher temperatures or longer times are used, an increased dosage of MF-15 may be necessary.

Penetration of the paste into the fabric is another critical factor. Before printing, it's essential to ensure the fabric is hydrophilic. If a fabric has a softener that causes water to bead, a pre-treatment is required. During the printing operation, ensuring complete paste penetration is vital. This can be achieved by adjusting paste viscosity, increasing scraping pressure, and allowing adequate time for the paste to permeate the fabric before it enters the oven. A simple test involves checking if the wet pattern is visible on both the face and back of the fabric after printing.

Troubleshooting common issues, such as uneven penetration or fabric blackening, is part of the learning curve. NINGBO INNO PHARMCHEM CO., LTD. provides guidance on these challenges. For instance, if the face appears clearer than the back after washing, it indicates incomplete paste penetration. Solutions might include diluting the paste, increasing scraping pressure, or allowing more time for permeation. If fabric blackening occurs, reducing baking temperature, shortening time, or increasing the MF-15 dosage are recommended steps.

Finally, post-baking and washing procedures are crucial. It's advised to wash immediately after baking to prevent acid diffusion that can blur outlines. Washing at around 40°C, with a small addition of soda flake for neutralization, helps remove the carbonized fibers effectively. By understanding and applying these principles, manufacturers can consistently produce high-quality burnt-out textiles, showcasing the innovation and reliability of NINGBO INNO PHARMCHEM CO., LTD.'s products.