We consider the low temperature Ising model in a uniform mag netic field h
> 0 with minus boundary conditions and conditioned on having no internal co
ntours. This simple contour model defines a non-Gibbsian spin state. For la
rge enough magnetic fields (h > h(c)) this state is concentrated on the sin
gle spin configuration of all spins up. For smaller values (h less than or
equal to h(c)), the spin state is non-trivial. At the critical point h(c) n
ot equal 0 the magnetization jumps discontinuously. Freezing provides also
an example of a translation invariant weakly Gibbsian state which is not al
most Gibbsian.