Leather Additive Testing

(1) Product types: tanning agents, retanning agents, fatliquoring agents, degreasing agents, liming agents, de ashing agents, enzyme preparations, softeners, fillers, thickeners, leveling agents, fixing agents, waterproofing agents, anti fouling agents, hand feel agents, finishing agents, brighteners, crosslinking agents, mold inhibitors, preservatives, defoamers, dispersants and other leather production process additives.

(2) Applicable scenarios: raw material acceptance, production process control, finished product performance evaluation, environmental safety testing, export compliance testing, arbitration testing.

(1) Appearance and physical and chemical properties
Appearance, color, odor, solid content, non-volatile matter, pH value, density, viscosity, fineness, particle size, moisture, ash content, solubility, dispersibility, emulsion stability, storage stability, freeze-thaw stability.

(2) Application process performance
Defatting efficiency, ash removal effect, enzyme activity, tanning coefficient, retanning and filling properties, softness, fullness, evenness, transparency, fixing effect, waterproofing, oil resistance, stain resistance, tactile effect, glossiness, adhesive strength, film-forming properties, and resistance to dry and wet wiping.

(3) Performance related to leather products
Tear strength, tensile strength, elongation, wear resistance, flexural resistance, yellowing resistance, aging resistance, sweat resistance, washing resistance, color fastness, breathability, and water vapor permeability.

(4) Environmental and safety indicators
Free formaldehyde, banned azo dyes, heavy metals (lead, cadmium, mercury, chromium, arsenic, nickel, cobalt), hexavalent chromium, polycyclic aromatic hydrocarbons, phthalates, alkylphenol polyoxyethylene ether (APEO), VOCs, organochlorine carriers, pentachlorophenol, dimethyl fumarate, residual mold inhibitors, antibacterial and bactericidal properties, corrosiveness, acute toxicity.