  The material that is ejected in a common-envelope (CE) phase in a close
binary system provides an ideal environment for dust formation. By constructing
a simple toy model to describe the evolution of the density and the temperature
of CE ejecta and using the \emph{AGBDUST} code to model dust formation, we show
that dust can form efficiently in this environment. The actual dust masses
produced in the CE ejecta depend strongly on their temperature and density
evolution. We estimate the total dust masses produced by CE evolution by means
of a population synthesis code and show that, compared to dust production in
AGB stars, the dust produced in CE ejecta may be quite significant and could
even dominate under certain circumstances.
