|  | D |
SECTION D — TEXTILES; PAPERS

PAPER

|  | D21 |
PAPER-MAKING; PRODUCTION OF CELLULOSE

|  | D21B |
FIBROUS RAW MATERIALS AND THEIR MECHANICAL TREATMENT

|  | D21C |
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSIC SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR

|  | D21D |
TREATMENT OF THE DIGESTED MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE; PROCESSES FOR ADDING SUBSTANCES TO THE FORMED WEB ON THE PAPER-MAKING MACHINE

|  | D21F |
PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER ON THEM

|  | D21G |
CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES (winders and rewinders for finished products, means for adjustment of wrinkles or lateral extensions Fulltext... Hierarchy... Expanded...B65H)

|  | D21H |
CARDBOARD; PAPER; THEIR MANUFACTURE NOT COVERED BY SUB-CLASS Fulltext... Hierarchy... Expanded...D21F

|  | D21J |
FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE