Water-rubbing dyeing and coloring process for lacquer coating leather

By forming a lacquer layer on the leather surface and utilizing the chemical bonding between natural lacquer and mineral pigments, the problem of poor adhesion of mineral pigments is solved, achieving a leather dyeing effect with high color fastness and unique texture, suitable for high-end products.

CN122304214APending Publication Date: 2026-06-30BEIJING FUXI MOUNTAIN TOURISM CULTURE DEVELOPMENT CO LTD
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Patent Information

Application Number
CN202610477499.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-13
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In existing leather water-based dyeing processes, mineral pigments have poor adhesion, making patterns easy to peel off. Furthermore, traditional synthetic resin base coatings suffer from poor environmental friendliness and insufficient color fastness.

Method used

The lacquer layer is formed using natural lacquer. The phenolic hydroxyl groups in urushiol undergo a coordination complexation reaction with the metal ions in the mineral pigments. Combined with natural plant gums as a thickener for the paint, chemical bonds are formed to improve the adhesion of the pigments. Furthermore, the film-forming properties and chemical stability of natural lacquer improve the texture of the leather.

Benefits of technology

It significantly improves pigment adhesion, achieves a color fastness of 4 or higher for both dry and wet rubbing, and gives leather a unique luster and texture. It is suitable for high-end leather goods, furniture and artwork, and avoids the environmental pollution caused by chemical thickeners.

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Abstract

The invention relates to a lacquer coating leather water rubbing dyeing coloring process adopting natural lacquer, and belongs to the technical field of leather dyeing and traditional process improvement. The technical problems that an existing mineral pigment is poor in adhesive force on the surface of leather, and patterns are prone to falling off are solved. According to the technical scheme, the method comprises the steps that firstly, the leather surface is pretreated; then preparing a lacquer coating layer on the pretreated leather surface, wherein the lacquer coating layer is formed by drying and curing natural lacquer under the conditions that the temperature is 20-30 DEG C and the relative humidity is 60-80%; then preparing natural plant colloid painting liquid and mineral pigment dispersion liquid; dropwise adding the pigment dispersion liquid to the surface of the painting liquid to draw a pattern, and contacting the lacquer coating surface of the lacquer coating leather with the painting liquid for 5-30 seconds to carry out water rubbing dyeing; and finally, drying at the temperature of 20-30 DEG C and thermally fixing for 24-72 hours to finish color fixation treatment. According to the lacquer coating, phenolic hydroxyl groups of urushiol in the lacquer coating layer and metal ions in the mineral pigment are subjected to a coordination complexation reaction to form stable chemical bonding, so that the adhesion fastness of the pigment is remarkably improved, and the dry and wet rubbing resistance color fastness reaches grade 4 or above. The method is suitable for the fields of high-end leather products, furniture, artworks, home decoration and the like.
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