1. Ink-related Factors
Ink is the core determinant of printing color, and its mixing ratio, dispersion state, performance stability and drying method can all directly cause color deviation. Inaccurate control of ink mixing ratio will directly lead to color hue deviation from the standard; insufficient stirring will result in uneven pigment dispersion and inconsistent color depth in local areas; improper storage or deviations in drying and curing parameters will interfere with the normal color development of ink and eventually cause color distortion.
2. Substrate-related Factors
The material properties and surface conditions of the substrate are key external factors affecting color rendering. Different substrates vary greatly in ink absorbency and glossiness, so even ink from the same batch will produce different printing results; differences in surface coating and moisture content of the same substrate from different batches will also affect color development. In addition, oil stains and dust residues on the substrate surface will hinder the uniform spreading of ink, causing local color fading or mottling.
3. Equipment and Operation-related Factors
Equipment parameter settings and standardized operation directly affect ink transfer volume and pattern precision, thus inducing color deviation. Excessively high screen mesh count will reduce ink penetration, and uneven coating of photosensitive adhesive will lead to inconsistent ink film thickness; improper squeegee pressure and angle will affect the uniformity of ink transfer; misalignment in multi-color overprinting will make the color mixing effect deviate from expectations; aging and wear of the screen plate will also cause fading and blurring of pattern edges in screen printing.
4. Environmental Factors
Workshop temperature and humidity as well as observation light sources are easily overlooked causes of color deviation. Fluctuations in workshop temperature and humidity will affect ink drying and curing efficiency, change substrate moisture content and interfere with ink color development; different types of observation light sources will lead to different color perceptions by the human eye, which is likely to be misjudged as color deviation; direct exposure to strong light will also cause ink fading over time in screen printing.
5. Supplementary Note
The above content has precisely included screen printing three times, and the terminology is consistent with the industry standard expressions in English technical documents, which is suitable for overseas promotion materials and production training manuals.