Abstract: Modeling material formulations and formulation systems usable in additive manufacturing of a three-dimensional object, featuring, when hardened, a Shore A hardness lower than 10 and/or a Shore 00 hardness lower than 40, are provided. Additive manufacturing processes utilizing these formulations and formulation systems, and three-dimensional objects obtainable thereby, are also provided.

Abstract: Some embodiments relate to a method for heating for controlled release of at least one substance to be delivered to a user via inhalation, comprising: allowing airflow through a pallet of source material from which the at least one substance is releasable by vaporization; wherein airflow enters the pallet through a first surface and exits the pallet through a second, opposite surface of the pallet; heating a first heating element in contact with the first surface of the pallet according to a first temperature profile; and heating a second heating element in contact with the second surface of the pallet according to a second temperature profile which is different than the first temperature profile.

Abstract: Some embodiments relate to a method for providing, during a single inhalation from an inhaler, a controllable ratio between at least a first active substance and a second active substance provided from the same source material, comprising: defining a ratio between the first and second active substances to be delivered to a user; setting operation parameters in accordance with the ratio, the operation parameters including at least one of a heating profile of the source material and an airflow profile through the source material; and operating the inhaler according to the operation parameters to deliver to the user, during a single inhalation, at least the first and second active substances at the defined ratio.