A method for treating an object (19, 119) manufactured from a material having a defined melting temperature, in particular by additive manufacturing, wherein the method comprises the following steps: - subjecting the object (19, 119) to hot isostatic pressing for reducing the porosity and increasing the density of the object (19, 119), wherein the hot isostatic pressing comprises - arranging the object (19, 119) inside an interior cavity (6, 106) of a pressure chamber (2, 102), - submerging the object (19, 119) in a liquid which is disposed inside the interior cavity (6, 106) and partially fills the interior cavity (6, 106), such that the liquid has a free liquid surface (18, 118) above which a portion (12, 112) of the interior cavity (6, 106) is located, - heating the liquid to a first temperature below the melting temperature, - pressurizing the liquid by providing pressurized gas in a portion (12, 112) of the interior cavity (6, 106) above the free liquid surface (18, 118), - maintaining the object (19, 119) inside the liquid heated to the first temperature and pressurized by the pressurized gas, and - arranging the object (19, 119) outside the liquid in a portion (12, 112) of the interior cavity (6, 106) above the free liquid surface (18, 118), characterised by further comprising the following steps: - subsequently heating the liquid to a second temperature above the melting temperature, - after the liquid has been heated to the second temperature, moving the object (19, 119) from a portion (12, 112) of the interior cavity (6, 106) above the free liquid surface (18, 118) into the liquid and submerging the object (19, 119) again within the liquid for reducing the surface roughness of the object (19, 119), and subsequently - withdrawing the object (19, 119) from the liquid and moving it into a portion (12, 112) of the interior cavity (6, 106) above the free liquid surface (18, 118). - subjecting the object (19, 119) to hot isostatic pressing for reducing the porosity and increasing the density of the object (19, 119), wherein the hot isostatic pressing comprises - arranging the object (19, 119) inside an interior cavity (6, 106) of a pressure chamber (2, 102), - submerging the object (19, 119) in a liquid which is disposed inside the interior cavity (6, 106) and partially fills the interior cavity (6, 106), such that the liquid has a free liquid surface (18, 118) above which a portion (12, 112) of the interior cavity (6, 106) is located, - heating the liquid to a first temperature below the melting temperature, - pressurizing the liquid by providing pressurized gas in a portion (12, 112) of the interior cavity (6, 106) above the free liquid surface (18, 118), - maintaining the object (19, 119) inside the liquid heated to the first temperature and pressurized by the pressurized gas, and - arranging the object (19, 119) outside the liquid in a portion (12, 112) of the interior cavity (6, 106) above the free liquid surface (18, 118), - arranging the object (19, 119) inside an interior cavity (6, 106) of a pressure chamber (2, 102), - submerging the object (19, 119) in a liquid which is disposed inside the interior cavity (6, 106) and partially fills the interior cavity (6, 106), such that the liquid has a free liquid surface (18, 118) above which a portion (12, 112) of the interior cavity (6, 106) is located, - heating the liquid to a first temperature below the melting temperature, - pressurizing the liquid by providing pressurized gas in a portion (12, 112) of the interior cavity (6, 106) above the free liquid surface (18, 118), - maintaining the object (19, 119) inside the liquid heated to the first temperature and pressurized by the pressurized gas, and - arranging the object (19, 119) outside the liquid in a portion (12, 112) of the interior cavity (6, 106) above the free liquid surface (18, 118), - subsequently heating the liquid to a second temperature above the melting temperature, - after the liquid has been heated to the second temperature, moving the object (19, 119) from a portion (12, 112) of the interior cavity (6, 106) above the free liquid surface (18, 118) into the liquid and submerging the object (19, 119) again within the liquid for reducing the surface roughness of the object (19, 119), and subsequently - withdrawing the object (19, 119) from the liquid and moving it into a portion (12, 112) of the interior cavity (6, 106) above the free liquid surface (18, 118).