How do you prevent viscosity drift and separation in sulfate-free shampoo during bulk production?

Quick Answer (for busy buyers)

Here’s the buyer-first summary. If your brand name is on the label, you usually act as the responsible person and must ensure the listing is submitted and kept current.

• In sulfate-free systems, viscosity and separation issues usually come from inconsistent polymer/surfactant hydration, salt-curve sensitivity, temperature/shear history, and incompatibility between fragrance/actives and the base.
• In bulk production we lock a validated manufacturing SOP: defined order of addition, controlled heating/cool-down, fixed mixing RPM and time, and hold-time limits.
• We also set batch targets (viscosity range, pH window, appearance) and test at multiple checkpoints using our phys-chem lab.
• Before you approve mass production, we do lab proofing and sample confirmation (our standard workflow Step 5, then Step 6 production投入).
• We support stability screening (centrifuge, accelerated aging, freeze-thaw as needed) plus microbial challenge testing, and can provide documentation like COA, batch records, and test reports to support your US compliance file (no promises on regulatory outcomes).
• For MOQ, most items start at 1,000-3,000 units.
• After sample sign-off, bulk production is typically 10-20 working days; packaging lead time is usually 10-30 working days (e.g., glass bottle ~15 days, acrylic ~30 days, cartons ~15-20 days).
• We also run packaging compatibility/leak checks to reduce separation and viscosity drift during storage and shipping.