Color measurement on flexible packaging films in the rotogravure industry is crucial for ensuring print consistency, brand identity, and maintaining overall product quality. Accurate color measurement can help minimize color deviations, maintain production standards, and reduce waste. Here’s a guide on how to effectively measure color on flexible packaging films:
1. Challenges of Measuring Color on BOPP Films
Flexible Packaging films have a glossy, reflective surface that can cause light scattering, making color measurement tricky. Traditional colorimeters may struggle to measure color on these surfaces, leading to inaccurate results. Therefore, selecting the right measurement tool is crucial.
2. Use of D/8 Spectrophotometers
For Flexible Packaging films, a d/8 (diffuse/8-degree) spectrophotometer is ideal. This geometry uses an integrating sphere that diffuses the light, minimizing the impact of surface gloss and providing a more accurate representation of the color. Unlike 45/0 instruments, which can exaggerate gloss effects, d/8 spectrophotometers deliver consistent results on reflective substrates like flexible packaging films.
3. Calibration and Standard Light Sources
Calibrate the spectrophotometer using a standard before taking measurements. For flexible packaging films, use standard light sources like D65 (daylight) to mimic natural viewing conditions, ensuring that the color measured matches the actual product appearance.
4. Measurement Procedure
Ensure the film sample is clean, flat, and free of any dust or fingerprints, as these can affect the color reading. Place the spectrophotometer probe flat against the film, avoiding any gaps or misalignment to ensure consistent readings.
5. Data Analysis and Adjustment
Once measurements are taken, compare them with the target color values. Any deviations should be analyzed, and adjustments to ink formulations or print settings should be made accordingly.
Accurate color measurement on flexible packaging films ensures consistent product quality, reduces costly reprints, making it an essential aspect of the rotogravure printing process
Qualiper offers a comprehensive range of spectrophotometers tailored to meet the diverse needs of manufacturers in various industries. With both portable and benchtop options available, Qualiper provides flexibility and versatility in color measurement solutions. Get in touch with us.
