Du moment que la cuisson biscuit est terminée, l’émaillage commence.

Here, du moment que means once, as soon as, or from the moment that.

So the sentence means that when the bisque firing is finished, glazing begins.

A useful thing to know is that du moment que can also mean provided that or as long as in other contexts. But in this sentence, it is clearly being used in a time sense, not a condition sense.

The comma separates the introductory clause from the main clause.

• Du moment que la cuisson biscuit est terminée = subordinate clause
• l’émaillage commence = main clause

This is very similar to English:

• Once the bisque firing is finished, glazing begins.

The comma is natural because the time clause comes first.

This is a technical ceramics expression. It refers to the bisque firing or biscuit firing, which is the first firing of the clay before glazing.

So:

• cuisson = firing
• biscuit = bisque / biscuit stage in ceramics

This does not mean a food biscuit. It is specialized vocabulary from pottery and ceramics.

In technical or specialized French, it is common for one noun to directly modify another noun, especially in set expressions.

So cuisson biscuit works like a compact technical label meaning bisque firing.

A learner might expect de, because French often uses de where English uses noun + noun structures. But in specialized vocabulary, direct combinations like this can occur.

In other words, cuisson biscuit is best understood as a fixed term in the ceramics context.

Because terminée agrees with la cuisson, which is feminine singular.

• la cuisson = feminine singular
• so the past participle is terminée

This is because the sentence uses être:

• la cuisson est terminée = the firing is finished

With être, the past participle usually agrees with the subject.

It is the verb être in the present tense plus a past participle used adjectivally.

• est = is
• terminée = finished

So la cuisson biscuit est terminée means the bisque firing is finished.

This is not really the same as the English present perfect has finished. It is more like describing a resulting state:

• is finished
• is completed

Because French uses elision before a vowel sound.

• le émaillage becomes l’émaillage

This is very common in French:

• le ami → l’ami
• la école → l’école
• le émaillage → l’émaillage

So l’ can stand for le or la before a vowel or silent h.

Émaillage means glazing or the application of glaze.

It comes from émail, meaning glaze or enamel, depending on context.

In ceramics, l’émaillage commence means:

• glazing begins
• the glazing process starts

So it refers to the stage when glaze is applied after the first firing.

The present tense is often used in French to describe:

• a general process
• a standard sequence
• an instruction-like statement
• something that happens whenever the condition is met

So l’émaillage commence means glazing begins as part of the normal process.

It is not necessarily describing one single event happening right now. It can describe a general rule:

• Once the bisque firing is finished, glazing begins.

The subject is l’émaillage.

• l’émaillage = singular
• commence = third person singular present of commencer

So:

• l’émaillage commence = glazing begins

Yes. Depending on the exact tone and context, you could also see:

• Quand = when
• Lorsque = when
• Une fois que = once
• Dès que = as soon as

For example:

• Une fois que la cuisson biscuit est terminée, l’émaillage commence.
• Dès que la cuisson biscuit est terminée, l’émaillage commence.

These are close in meaning, though du moment que has its own nuance and can sometimes sound slightly more formal or specialized depending on context.

A natural translation would be:

Once the bisque firing is finished, glazing begins.

Other good possibilities are:

• As soon as the bisque firing is complete, glazing begins.
• When the bisque firing is finished, the glazing process starts.

The best choice depends on how technical or natural you want the English to sound.