TAPPI T504 CM 2007

TAPPI T 504 cm-07 provides qualitative and quantitative procedures for determining animal glue and gelatin in paper.

TAPPI T 504 cm-07 is a technical test method for detecting and measuring animal glue in paper, including glue hardened with formaldehyde, alum, or amino-formaldehyde resins and gelatin used in photographic papers. It includes macro and micro qualitative procedures based on the Ehrlich reaction, plus a quantitative spectrophotometric procedure that measures hydroxyproline after extraction, hydrolysis, and color development. The document covers apparatus, reagents, specimen preparation, calibration, calculations, reporting, precision, safety considerations, and supporting references.

Application Scope: Suitable for paper laboratories, quality-control teams, research organizations, and analysts evaluating glue or gelatin sizing in paper and related materials.