Explanatory notes
… of any quality and the bonding material may be of animal, vegetable or mineral origin (e.g., dextrin, glue, tar, gum, … materials) by the fact that, on immersion in water or other suitable solvent, the separate layers can be readily parted … which are internally reinforced with bitumen, tar, asphalt, textile or other material (e.g., textile or metal gauze, …