GREIBOTAN GNT is a specialised mild neutralizing agent for chrome-tanned leather that simultaneously provides a retanning effect without adding substance weight to the leather. Its unique formulation lowers the isoelectric point of wet blue leather, creating the optimal conditions for deep and even penetration of retanning agents, dyes, and fatliquoring agents in all subsequent processing steps.
GREIBOTAN GNT exhibits strong complexing power towards chrome leather and low astringency, enabling very rapid and uniform penetration throughout the full leather cross-section. This not only shortens processing times but also contributes to a consistently fine and smooth grain surface across the entire hide.
GREIBOTAN GNT offers maximum process flexibility: it can be used as a standalone neutralizing agent or in combination with conventional neutralizing salts such as formate and bicarbonate, allowing tanners to precisely adapt the neutralization recipe to specific leather types, thicknesses, and end-use requirements.

Key Benefits

• Very mild neutralization with simultaneous retanning effect
• No added substance weight to the leather
• Lowers the isoelectric point of wet blue for improved chemical uptake
• Strong complexing power towards chrome leather with low astringency
• Rapid and uniform penetration for shorter processing times
• Contributes to a fine and smooth grain surface
• Suitable for use alone or in combination with formate and bicarbonate