Bright Stock Supply & Sourcing Guide
Bright stock is a high-viscosity base-oil component used to build film strength and body in demanding lubricant formulations. Grade naming varies, so viscosity at 100°C, viscosity index, flash point, pour point, colour, sulphur and carbon residue should be defined before commercial comparison.
Specification checklist for the RFQ
- Kinematic viscosity at 100°C
- Viscosity index and density
- Flash point, pour point and colour
- Sulphur, carbon residue and stability limits
Applications and end-use context
- Marine and heavy-duty engine oils
- Gear oils and cylinder lubricants
- Grease and high-viscosity formulations
- Blending with neutral base oils
Delivery structure and logistics
Bright stock often needs controlled heating for efficient transfer, but overheating should be avoided. Tank coils, loading temperature, pumpability, previous cargo, vessel cleanliness and discharge capability must be agreed for bulk movement; packed options need payload and handling checks.
Prices shown on the site are public market references only. An executable indication depends on specification, origin, destination, Incoterm, freight, insurance and payment structure.
Documents and commercial inputs
- Target viscosity and complete specification
- Recent COA and producer identity
- Heating and transfer instructions
- Tank cleanliness and inspection requirements
How the inquiry is reviewed
Define product, grade, quantity, destination and timing.
Review specification, documents, logistics assumptions and compliance points.
Where appropriate, summarise possible sourcing or freight routes for the next commercial discussion.
Frequently asked questions
Is bright stock the same as SN500?
No. Bright stock is substantially more viscous and serves different formulation roles.
Why is loading temperature important?
It affects pumpability and transfer time, while excessive heat can create quality and safety concerns.
Submit a structured RFQ
Include the exact specification, quantity, destination, timing and delivery terms for a focused review.