further reading:
161 industrial paper
162 technical paper (excluding insulating paper)
163 household paper
164 cardboard
165 office and daily paper products
166 printed publications
167 photos, pictures and drawings < Playing cards
169 paper and plastic packaging articles that do not belong to other categories
161 office binding and cutting tools
1611 office stationery (excluding pens, ink, printing and glue)
1612 ink, inkstone
1613 seal and printing oil
1614 pens
1614 pens. Painting instruments
1617 painting instruments (excluding drawing instruments and pens)
1618 typewriters, copying machines, mimeographs and their accessories (including printing type and printing plates)
1619 teaching instruments (excluding instruments for teaching experiments)
162 indoor model objects (excluding model specimens for teaching) < p