Этот отпечаток — репродукция.

Because Russian usually omits the present-tense verb to be.

So:

• Этот отпечаток — репродукция = This print is a reproduction

Russian often says this literally as This print — reproduction.

You do use a form of быть in other tenses:

• Этот отпечаток был репродукцией = This print was a reproduction
• Этот отпечаток будет репродукцией = This print will be a reproduction

The dash marks the missing is in a sentence where both parts are nouns:

• Этот отпечаток = the subject
• репродукция = the predicate noun

So the dash is very common in sentences of the type X = Y.

In speech, you do not pronounce the dash as a word; you usually just make a slight pause or use the right intonation.

Because этот is the form of this that agrees with the noun отпечаток.

Отпечаток is:

• masculine
• singular
• nominative

So you need этот.

Compare:

• этот отпечаток = this print
• эта репродукция = this reproduction
• это can mean this when it stands by itself, as in Это репродукция = This is a reproduction

So:

• этот = adjective-like, goes with a noun
• это = stand-alone this/it is

Both main nouns are in the nominative singular here.

• этот отпечаток = nominative singular
• репродукция = nominative singular

That is normal in a present-tense equation sentence like this.

Good question. In Russian, predicate nouns are often nominative in simple present-tense sentences with no written verb:

• Этот отпечаток — репродукция

But when you use an explicit verb like быть or являться, the instrumental is very common, and with являться it is standard:

• Этот отпечаток был репродукцией
• Этот отпечаток является репродукцией

So in this sentence, nominative is normal because it is a simple present-tense identification sentence.

Отпечаток has a broad meaning: impression, mark, print, imprint.

Depending on context, it can mean things like:

• a printed impression
• a mark left on a surface
• a fingerprint, if the context says so, as in отпечаток пальца

In Этот отпечаток — репродукция, it most likely means a print or printed impression, especially in an art or publishing context.

Not exactly.

• репродукция usually means a reproduction, especially of a work of art
• копия is a more general copy

So:

• репродукция картины = a reproduction of a painting
• копия документа = a copy of a document

A репродукция often suggests something reproduced mechanically or printed from an original artwork, not just any duplicate.

Yes, but the meaning shifts slightly.

• Это репродукция = This is a reproduction
• Этот отпечаток — репродукция = This print is a reproduction

The second sentence is more specific because it names the object as этот отпечаток.

You could also say:

• Этот отпечаток — это репродукция

But that sounds more emphatic or conversational. The shorter version is more neutral.

Russian has no articles like a and the.

So репродукция by itself does not tell you whether English should use:

• a reproduction
• the reproduction

You decide from context. In an isolated sentence, a reproduction is the most natural translation.

Yes, Russian word order is flexible, but the neutral order here is:

• Этот отпечаток — репродукция

That presents this print as the topic and reproduction as the new information.

A different order is possible in special contexts, but it becomes marked or stylistic. For a learner, the version you have is the best normal pattern to use.

The stress is:

• Э́тот
• отпеча́ток
• репроду́кция

So you can write it as:

• Э́тот отпеча́ток — репроду́кция.

A rough pronunciation guide:

• Э́тот ≈ EH-tət
• отпеча́ток ≈ at-pye-CHA-tək
• репроду́кция ≈ ree-pra-DOOK-tsi-ya

You do not need to pronounce every unstressed vowel as clearly as in spelling; Russian reduces many unstressed vowels in normal speech.