Other commodities are produced from trees:
Charcoal: Partially burnt wood shipped in bags or in bulk. Very dusty and can easily absorb moisture to as high as 20% of its own weight. A somewhat dangerous cargo liable to spontaneous combustion if in contact with oils/greases.
Cork: The very light outer bark of the cork-oak, grown in Southern Europe and Northern Africa. Must be kept completely dry but this increases the dust to which this cargo is prone. Usually carried in bales, its stowage factor varies widely depending on the degree of pressing in the bale. Can become very brittle when cold.
Extracts: The extracts from barks of certain trees provide medicinal tonics and drugs as well as liquids used in the tanning industry. These extracts may be carried in liquid form but also are dried and transported in bags in small quantities. Such bags must be kept dry and separated from each other by straw or sawdust or similar, for otherwise they have a tendency to stick together and, if wettened, to solidify. Some may be odorous and taint nearby cargoes.
Gums: Resins obtained from various trees may be used in a wide variety of industries. for coloring/tanning; stiffening and adhesives; medicines; confectionery; and for clothing processes among them. Most gums are liable to melt at about normal temperatures and must be kept cool as a result. They must also be kept away from oils and greases which may dissolve certain gums and, since they readily absorb moisture, they may be liable to overheat. If carried in bags they should be carried as for extracts, above.
Rubber: The coagulated sap’ of certain tropical trees.
- Extracts Bagged Stowage Factor 35/50
- Gums Bagged Stowage Factor 50/65
- Cork Bales Well Pressed Stowage Factor 200/225
- Cork Bales Lightly Pressed Stowage Factor 300/400
- Charcoal Bagged Stowage Factor 170
- Charcoal Bulk Stowage Factor 100