had been blueprinting

• past perfect progressive

  past perfect progressive

  Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.

  of blueprint.
  blueprint

  noun

  a process of photographic printing, used chiefly in copying architectural and mechanical drawings, which produces a white line on a blue background.

Related Words

• draft
• game plan
• master plan
• model
• prototype
• scheme
• sketch