Appearance and color
Why black doesn't give the opacity you need — grade, dispersion, material
Reasons for weak opacity, how to choose the right grade, and economical vs deep-black.
Sometimes black comes out gray or does not give the opacity needed, which affects the product's look and value. The problem is not always the quantity; it can be the grade choice or other factors like product thickness and base color.
Black masterbatch differs by carbon black content, dispersion quality, tinting strength, gloss, and coverage. An economical grade may suit products that do not need a deep black, while products that need strong color prefer a high-black grade.
Like white, random overuse is not always the lowest-cost answer. Choosing the right grade gives better opacity and stable color from batch to batch without excess usage.
The correct comparison is on the coloring cost per ton of material and the final result, not the price per kilogram of masterbatch alone. A higher dispersion and tinting grade may need less quantity for the same result.
Before deciding, test the grade on the same material and thickness to see the real opacity under your conditions, then choose what fits best.