How do historical IOCL bitumen emulsion price lists compare with current market pricing?

Historical lists are useful for trend direction but not for direct purchasing decisions because feedstock prices, logistics cost, taxes, and demand patterns change significantly over time. Older price lists may also reflect different grade availability, packaging assumptions, and regional freight structures. Current pricing is more often contract based with volume tiers, region wise delivery, and project linked discounts. To compare fairly, normalize by delivered cost per ton of residual binder and include packaging and freight. Use historical lists only as context, then request current quotations with grade, binder content, and delivery terms clearly stated.