Patent ID: 7776603

Claim:
A method for identifying a product specification for a batch, lot, or shipment of particulate material comprising providing said particulate material; said particulate material having at least one morphological value selected from the group consisting of shape, size, and structure or having at least one chemical value selected from at least one of the group consisting of overall composition, surface composition, and extractable materials, and measuring and obtaining at least one interfacial potential property value for said batch, lot, or shipment of particulate material, and including the interfacial potential property value on a product specification sheet, purchase order, invoice, contract, waiver to a contract, or combinations thereof for the batch, lot, or shipment of particulate material, wherein said particulate material is carbon black or silica, and wherein particulate material is within product specification based on i) said interfacial potential property value and ii) said morphological value or chemical value.