Changing Color Pigment Brands with the Same CI No.

Hello! I understand your question about changing color pigment brands while keeping the same CI No.

While color pigments with the same CI No. indicate the same basic chemical composition, the manufacturing process of each brand can differ, leading to variations in the physical properties of the pigment. For example:

• Color Strength: Pigments from different brands may have different color strengths, requiring different quantities to achieve the same shade.
• Shade: Even with the same CI No., the exact shade might vary slightly (e.g., leaning more yellow, red, or blue).
• Particle Size and Dispersion: Particle size and characteristics affect how well the pigment disperses in the formulation base, color uniformity, and opacity.
• Surface Treatment: Some pigments might have surface treatments to help them disperse in different types of bases (e.g., oil or water), and this treatment can vary between brands.

Therefore, you cannot always simply swap brands using the exact same quantity in your formula. Using the same amount might result in a color that is lighter or darker, or a slightly different shade.

Recommendations:

1. Start with Testing: You can begin by trying the same quantity in a small-scale test batch.
2. Compare and Adjust Quantity: Compare the resulting color to your original formula and gradually adjust the amount of the new pigment until you achieve the desired color and intensity.
3. Check Other Properties: Besides color, you should also check for dispersion, compatibility with other ingredients in your formula, and color stability.
4. Technical Data Sheet (TDS): If possible, request the TDS for the new pigment from the supplier to compare technical data such as Tinting Strength, Color Values (Lab*), particle size, etc. This can help with initial predictions.

In summary, even with the same CI No., physical properties can differ between brands, requiring testing and quantity adjustment when making a substitution.

I hope this information is helpful. Feel free to ask if you have more questions!