Fast yellow

When purchasing Fast Yellow (such as Pigment Yellow 1, 3, 12, or 13), you must evaluate the Color Index (C.I.) number to ensure it matches your application. Key metrics include oil absorption (g/100g), which affects ink/paint viscosity, and heat resistance (typically 140°C to 200°C). For plastics, ensure the melting point and dispersion rating are high to prevent clogging in extrusion machinery.

Fast Yellow pigments vary significantly in stability. You should request the Blue Wool Scale rating (1-8); for outdoor applications, a rating of 7 or 8 is essential. Additionally, ask for QUV accelerated weathering test reports to confirm the pigment won't fade or chalk when exposed to UV radiation and moisture over time.

If the pigment is used for food-contact materials or toys, it must comply with FDA 21 CFR (USA) or EU Regulation 10/2011. Ensure the supplier provides a Heavy Metal Content Analysis (testing for Lead, Cadmium, Mercury, and Hexavalent Chromium) and confirms the product is AP(89)1 compliant and REACH registered for the European market.

The difference lies in particle size distribution. Transparent grades have smaller particles and are ideal for offset inks and metallic coatings, whereas opaque grades have larger particles, providing better hiding power for industrial paints and plastics. Specify your required opacity level during the RFQ process to avoid application failure.

Utilize Secured Trading Services on platforms like Made-in-China.com to protect your payment until delivery. To ensure quality consistency, always request a Pre-Shipment Inspection (PSI) and ask the supplier to provide a COA (Certificate of Analysis) for every batch. Comparing the Gold Sample (initial sample) with the mass production batch via spectrophotometer testing is highly recommended.

Fast Yellow is generally classified as non-hazardous, but you must obtain a valid MSDS (Material Safety Data Sheet) and a Non-Hazardous Chemical Declaration to avoid customs delays. Ensure the packaging is moisture-proof and UV-shielded (typically 25kg craft bags with PE liners) to prevent pigment degradation during long-term sea freight.

Pigment prices are sensitive to raw material costs (petrochemical derivatives). Negotiate based on annual volume rather than single orders to secure a 10-15% discount. For new suppliers, start with a trial MOQ (e.g., 500kg) before committing to full container loads (FCL). Always clarify if the price is FOB (Free On Board) or CIF (Cost, Insurance, and Freight) to accurately calculate your landed cost.