In the buildings of the last century, the height of the ceilings is extremely low. It will not work to lift them, but you can at least visually increase the height of the ceiling.
Color
Remove the line connecting the ceiling and walls. Visually enlarge the ceiling you can, if you paint it and the upper part of the wall in the same color. If you paint all the walls in this color as a whole, and not partially, then you can not only visually enlarge the ceilingbut also expand the space.
Verticals
Lines directed vertically upward, as it were, lengthen the walls. This will allow visually increase the height of the ceiling... To achieve the effect, you can not paint stripes, but choose a wallpaper with a vertically oriented texture.
Reflection
Reflective flooring can visually enlarge the ceiling due to the apparent increase in the volume of the room.
Another option visually enlarge the ceiling - use mirrors in its design. The ceiling, fully or partially covered with a mirror coating, increases the volume of the room and, as it were, rises above the floor.
"Extend" walls with paint
When painting walls, use the ceiling area: this will make it a little more compact in area, but the walls will visually lengthen. The same effect can be achieved with a plasterboard or stretch ceiling partially painted in the color of the walls, as well as using a ceiling plinth to match the wall color.
Decor. Try to place decorative design elements in the center of the room. Wall decor (paintings, posters) should not hang “under the ceiling”, the best place is at the eye level of the beholder. Such a technique shifts the focus to the decor, distracting it from the ceiling and its height.
Furniture
Visually increase the height of the ceiling correctly selected furniture will help. It should not be high; the use of "walls" and cabinets with mezzanines is unacceptable. The only exception is sliding wardrobes, which can be decorated with mirrored doors for optical expansion of the room.
Shine
Light streams directed vertically from bottom to top “draw out” the room and help visually enlarge the ceiling.
Chandeliers or pendants in the center of the room are not suitable, they are replaced with wall-mounted lighting sources, competent illumination of individual pieces of furniture or the ceiling itself, for example, built-in spotlights.
Using these techniques together or separately will help visually enlarge the ceiling in your apartment.