A chemical component in chrome tanning solutions that precisely controls pH levels for optimal chromium absorption and leather quality.
The Basicity Modifier is a critical chemical component in chrome tanning agent solutions that regulates the alkalinity (pH) of the tanning bath. It controls the rate and degree of chromium salt fixation to collagen fibers in hides, determining the leather's shrinkage temperature, softness, grain smoothness, and color uniformity. Proper basicity adjustment ensures maximum chromium uptake while minimizing environmental discharge.
诱因 → 失效模式 → 工程缓解
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Proper basicity (33-67%) determines chromium fixation efficiency, leather shrinkage temperature, and physical properties. Low basicity causes poor penetration and soft leather; high basicity causes surface precipitation and grain damage.
Rapid addition causes localized pH spikes that precipitate chromium on the hide surface, resulting in uneven tanning, grain roughness, and reduced chromium uptake in the leather interior.
Not directly. Sodium carbonate acts faster than bicarbonate; magnesium oxide provides more gradual adjustment. Switching requires recalibration of addition rates and monitoring to maintain target basicity curves.
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