Dyehouse

TRUPOTAN NCR

polymer retanning agent

Basis:

Modified acrylic polymer.

Appearance:

Yellowish viscous liquid.

Charge:

Lightly anionic.

Active matter:

Approx. 28%.

pH value (1:10):

Approx. 4.2.

Light fastness:

Excellent.

Heat yellowing:

Excellent.

Properties

TRUPOTAN NCR is a polymer retanning agent, based on modified acrylic polymers intended for the tanning and retanning of all types of leather.

TRUPOTAN NCR improves the fullness and grain tightness producing especially fine grained leather.

TRUPOTAN NCR encourages a good chrome fixation and distribution in the final leather.

TRUPOTAN NCR improves the penetration of the dyestuff with minimal loss of dye intensity.

Application

In chrome tanning between 0.5 and 1.0 % TRUPOTAN NCR can be applied to improve the grain tightness of the wet blue. The pH-value of the chrome tanning should lie over pH 3 before application of the TRUPOTAN NCR.

In the rechrome between 1.5 to 3.0 % TRUPOTAN NCR may be applied, based on shaved weight, to improve the fullness and grain tightness.

Safety and storage

When handling TRUPOTAN NCR, normal safety precautions associated with the handling of chemicals should be observed. For more specific details please refer to our safety data sheets.

TRUPOTAN NCR can be stored for up to one year, if temperatures below 5 °C and above  40 °C can be avoided. On prolonged storage or extremes of temperature TRUPOTAN NCR may exhibit some settlement which can be rectified by either warming and/or stirring the product thoroughly before use.

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