It is the right match between the lid, the jar, the content and the process (your sealer, your method, e.g. pasteurisation). Some trials are compulsory to ensure that the lid meets all your requirements. These tests involve your responsibility, we are at your disposal to help you (samples supplying, filling and sealing of jars in our workshop…).

Conduction sealing

It is the principle of an iron : a heating metallic plate applies a certain pressure during a precise time onto a lid placed on a container. The heat makes the heatseal layer of the lid melt and the pressure allows the chemical bonding with the pacakging to be sealed.


The embossing is the texture given to the aluminium foil. The aluminium foil is produced smooth. In order to allow the distribution of the lids one by one by an automatic sealing machine, it is necessary to create a layer of air between the stacked lids : thus embossing has before all a true function above any aesthetic consideration. There are 3 main embossings: small worms, linen, diamond point.


The incompatibility problems are very unusual. It can be a detachment of the lid, a delamination of the foil structure or a chemical attack of the aluminium layer. There are always some alternative foils to the ones we propose in first place, please, feel free to contact us, there is always a solution.

Induction capsealing

The induction sealing uses an electromagnetic field to heat up a metallic lid : a metallic lid can be heated through a plastic cap, which applies the required pressure onto the lid. The caps are delivered by your usual suppliers already equiped with a lid, called ‘liner’. The sealing occurs after the screwing of the caps, without any contact.

Induction sealing

It is the principle of the electromagnetic cooking hob : an electromagnetic field heats the metallic layer of the lids. This heat activates the heatseal lacquer of the lid, which, through the pressure applied by the sealing head (or the caps – please refer to capsealing induction), allows the chemical bonding onto the containers. It excludes the use of plastic lids.


A lid is a shape cut in a foil, composed of at least 2 layers : a “base” layer, aluminium or PET, and a heatseal layer with an activation temperature lower than the one of the “base” layer. The foils can have more layers to provide specific properties of chemcial barrier, mechanical resistance…

Orifice reducers

Little plastic plugs that comes into the opening of bottles for shampoo, lotion, liquid, to reduce the output of the product, depending on the orifice diameter. This orifice can be sealed in our workshop, by a sub-contracting operation.

Peeling strength

It is the sensation at the opening, when the sealed lid is removed. More or less strong, it reflects the more or less strong adhesion of the lid onto the jar. Practically, it is linked to the opening strength, that can be measured with a dynamometer, or with weight pliers.


Process of customization of the lids by printing, available on any embossing.


Action of sealing a thermoadhesive lid due to heat, time and pressure onto a compatible containers. There are two main technologies : sealing by conduction and sealing by induction.


Way of customization by making the embossing flat again.


The Toptherm is a EMBATHERM’s creation. It is composed of a aluminium or PET ring, sealed onto a plastic obturator, which bonds it to its jar. It provides the tightness and the tamper evidence of a classic lids together with the elegance of a visible and re-usable obturator.