Import 4l Black Solder Mask — Buy in Bulk from Supplier in China

The 4L Black Solder Mask from Shenzhen Hemeixin Electronics Co., Ltd. is a UV-curable liquid epoxy resin formulation designed for four-layer PCB fabrication. It delivers a matte black finish with high contrast for optical inspection, while its chemical composition ensures strong adhesion to copper, FR-4, and other common PCB substrates. The mask’s thermal stability rating meets typical reflow soldering profiles up to 280°C, and its rapid curing time supports high-volume production lines.

As a liquid solder mask, it is applied via screen printing or spray coating, with typical dry film thickness ranging from 20 to 40 micrometres. The formulation includes UV-sensitive photoinitiators and pigments that block light at wavelengths below 400 nm, a standard requirement for photolithographic processes. Industry benchmarks for black solder masks include a dielectric strength of at least 5 kV/mm and a surface resistivity above 10^12 ohms, which this product aligns with for standard applications.

This solder mask is used in automotive ECUs, telecom hardware, and consumer electronics where dark PCB finishes are preferred for branding or light-blocking purposes. Buyers typically source it in 1L or 4L containers, with bulk packaging available for contract manufacturers. The product is shipped in UN-approved containers to prevent leakage during transit. Confirm compatibility with your specific substrate and curing equipment before ordering.

Shenzhen Hemeixin Electronics Co., Ltd. is based in Guangdong, Shenzhen, with its registered address at 518001 China. The company operates as an imported-tier supplier specialising in PCB materials and related chemicals. Its trust tier is classified as harbor, indicating a baseline level of verification for trade transactions.

The supplier’s profile shows a response rate of 0.00% and an average response time of 0 hours, which suggests that direct communication may require follow-up through alternative channels. The company does not list additional certifications, production capacity, or client references in its public profile, so buyers should verify these details independently before placing orders.