Further glass may be gathered on the outside, color bits may be picked up, glass details may be formed, etc. The very high temperatures involved and the extended heating time require care in setting up facilities and often will require special zoning in places that have it. Paperweights are made with a combination of skills, although they can be made entirely on the pipe or its solid relative, the punty. Classic paperweights require much preparation which may include flameworking to make millifiore rod or animal or plant figures which are encased in clear molten glass to make the final piece. Modern style abstract glass forms and bubbles are less complicated to make.
Paperweights require an extended annealing time that can take days because of their size.
You Ever Wanted to Know About Glass Beadmaking. It is available from Frantz Beads, Wale, or Hoy's. It includes good drawings, lots of suggestions, etc. While this book does not replace Ed's Big Handbook of Glassblowing as an introduction to techniques and attitudes of getting involved in glass, it is not as fearsome as the title might reflect. If I were teaching classes and felt I had a sure set of exercises and skills to bring students up from beginner, I would encourage purchase of this book because the essentials of working glass at the advanced beginner and low intermediate level are there at the beginning of the book.