C09H1/00	7	Pretreatment of collagen-containing raw materials for the manufacture of glue	C09H1/00	C09H1/00		57
C09H1/02	8	of bones (defatting bones C11B)	C09H1/02	C09H1/02		73
C09H1/04	8	of hides, hoofs, or leather scrap (recovery of tanning agents C14C)	C09H1/04	C09H1/04		164
C09H3/00	7	Isolation of glue or gelatine from raw materials, e.g. by extracting, by heating (gelatine for foodstuffs A23J1/10)	C09H3/00	C09H3/00		483
C09H3/02	8	Purification of solutions of gelatine	C09H3/02	C09H3/02		131
C09H5/00	7	Stabilisation of solutions of glue or gelatine	C09H5/00	C09H5/00		164
C09H7/00	7	Preparation of water-insoluble gelatine	C09H7/00	C09H7/00		128
C09H9/00	7	Drying of glue or gelatine	C09H9/00	C09H9/00		50
C09H9/02	8	in the form of foils	C09H9/02	C09H9/02		90
C09H9/04	8	in the form of granules, e.g. beads	C09H9/04	C09H9/04		141
C09H11/00	7	{Adhesives based on glue or gelatine}	C09J189/00	C09H11/00		273
