The present invention relates to an improved process for dyeing leather using low intensity power ultrasound for application in leather industry. This has potential use in the dye yard of leather tanning industry for dyeing any leather with even shade as well as full penetration even at room-temperature at the cost of very low energy consumption even without the aid of conventional drumming or mechanical action. The process steps are: washing the leather by conventional method, adjusting the pH of the leather in the range of 4-6.5, dyeing the leather, as formed in step (ii), at a maximum ultrasonic intensity of 0.5 W/cm2, either continuously or with pulsing, at maximum temperature of 60°C, fixing the dye by conventional method over a period of 20-60 min.
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机译：本发明涉及一种用于皮革工业的使用低强度功率超声对皮革染色的改进方法。这在皮革鞣制业的染场中具有潜在的用途，即使在没有常规鼓磨或机械作用的情况下，也能以非常低的能源消耗为代价，甚至在室温下以均匀的阴影和完全渗透力染色任何皮革。处理步骤是：通过常规方法洗涤皮革，将皮革的pH调节在4-6.5的范围内，将步骤（ii）中形成的皮革染色，最大超声强度为0.5W / cm 2，或者在最高60°C的温度下连续或以脉冲方式，通过常规方法在20-60分钟内固定染料。
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