Digital printing printing high fineness, colour realistic and vivid, but the production sometimes encountered after printing found that there is a staining problem, which not only affects the aesthetics of the product, but also may increase the cost and reduce customer satisfaction, so how to solve the problem of staining found after printing digital printing?
Part.01 Ink quality and compatibility
Ink is one of the core materials for digital printing, and its quality and compatibility with the fabric directly affects the printing effect. Low quality or incompatible ink may cause excessive permeability, resulting in staining between the colours. Choose high-quality ink that matches the printing equipment and fabric type, ensure that the ink has good adhesion and colour stability, and conduct small sample tests before mass production to verify the compatibility of the ink with the fabric.
Part.02 Inadequate fabric pre-treatment
Before printing, fabrics need to undergo appropriate pre-treatment, such as washing, de-sizing, etc., to remove surface impurities and improve ink absorption properties. Insufficient or excessive pre-treatment may result in uneven ink distribution or colour bleeding. Strictly follow the pre-treatment instructions provided by the fabric supplier and adopt a standardised pre-treatment process. For different types of fabrics, the pretreatment method may need to be adjusted to ensure that the surface of the fabric is clean and suitable for ink adsorption.
Please take a look at this product from our company, 1.9 Meter High Speed Digital Sublimation Printer
● Servo Motor: LEADSHINE (Famous Brand in China)
● Guide Line: HIWIN (Famous Brand in China) or THK (Famous Brand in Japan)
● Cartridge: Original Import (Clean, Pump and Moisturize Automatically)
● Main Board: Design and Produced by ourselves, it is stability and 15Months Warranty time
● Ink Supply System: Bulk Ink Continues Supply System.
Part.03 Improperly Set Printing Parameters
Print head height, inkjet volume, drying temperature and time and other parameters of the improper settings, will directly affect the ink in the fabric fixation effect, too high or too low ink deposition may cause colour penetration. Fine tune the printing parameters according to the specific requirements of the equipment used and the fabric. Conduct several trials to find the best combination of print settings to ensure that the ink adheres evenly and in the right amount to the fabric.
Part.04 Drying and Curing Process Issues
The drying and curing steps after printing are essential to prevent colour staining. If drying is inadequate or curing temperatures are too low, the solvents in the ink may not evaporate completely, causing colours to bleed through each other. Ensure that the post-print drying process is properly controlled in terms of temperature and time, select the appropriate curing method (e.g. heat sealing, infrared or UV curing) depending on the type of ink, and monitor the process to avoid over- or under-curing.
Part.05 Equipment Maintenance and Cleaning
Accumulation of dirt on key components such as print heads and ribbon guides can directly affect printing accuracy and ink distribution, indirectly leading to colour staining. Regularly and thoroughly clean and maintain your printing equipment, especially the printhead and ribbon, to keep it in good working order and follow the manufacturer's maintenance guidelines to reduce the risk of colour staining caused by equipment problems.
