What glue to hold wooden batten to ceiling for window blind
Is it 1cm plaster? If so, the hanging load capacity is limited by the plaster, not the glue. Any vibration from movement of the blinds will eventually weaken the plaster and the integrity of the plaster &amp; paint could fail, letting go of the blinds while keeping the glue in tact!
Perhaps you can run a wooden horizontal support (a batten, as you say) along the ceiling from wall to wall as a backer for the blinds, and bracket the support at the walls.