Luettuani takin pesuohjeen huomasin, että se pitää kuivata ripustimella, ei kuivausrummussa.

It means after I had read or having read.

In this sentence, Luettuani takin pesuohjeen sets up an earlier action, and huomasin tells what happened next. So the order is:

• first: I read the washing instructions
• then: I noticed something

It is a compact, very Finnish way to say after reading....

Yes. Luettuani is natural and common, but it sounds a bit more compact and written than everyday speech.

A more conversational version would be:

Kun olin lukenut takin pesuohjeen, huomasin...

That means basically the same thing: When/after I had read the coat’s washing instructions, I noticed...

So:

• Luettuani... = shorter, more compact, often a bit more formal/written
• Kun olin lukenut... = more explicit, often easier for learners, common in speech too

The person who read is the same person who noticed.

The ending -ni tells you that the subject is I. So:

• luettuani = after I had read
• luettuasi = after you had read
• luettuaan = after he/she/they had read

This construction normally refers to the same subject as in the main clause. Here:

• Luettuani...
• huomasin...

Both actions belong to I.

They end in -n for different reasons.

• takin = of the coat
  It modifies pesuohjeen. So takin pesuohje means the coat’s washing instruction(s).

• pesuohjeen = the object of read
  With lukea when you read something as a complete whole, Finnish usually uses the total object form, which in the singular often looks like -n.

So the structure is:

• takin = genitive modifier
• pesuohjeen = object

Even though they look the same on the surface, they are doing different jobs.

Because Finnish very often makes compound nouns.

pesuohje =

• pesu = washing
• ohje = instruction

So together it means washing instruction or care instruction.

This is extremely normal in Finnish. English often writes similar ideas as two words, but Finnish usually joins them into one compound.

Finnish often uses the singular for this kind of idea when talking about the care instruction or label as one unit.

So pesuohje can refer to the washing/care instruction in a general sense, even if the label contains several details.

You can also see plural pesuohjeet, but the singular here is perfectly natural.

että introduces a that-clause.

So:

• huomasin = I noticed
• että se pitää kuivata... = that it has to be dried...

This is very similar to English I noticed that...

The comma before että is normal Finnish punctuation.

Here pitää means must / have to / need to.

So:

• se pitää kuivata = it has to be dried

This is a different use from pitää meaning to like.

Compare:

• Pidän kahvista. = I like coffee.
• Se pitää kuivata. = It has to be dried.

A useful clue is that pitää meaning like uses the case pattern pitää jostakin. That is not what is happening here.

Because se is the thing being dried, and in this kind of necessity construction with pitää + infinitive, the total object is often in the nominative in standard Finnish.

So:

• Se pitää kuivata. = It has to be dried.

This can feel surprising if you are used to forms like:

• Kuivaan sen. = I dry it.

A simple learner-friendly way to remember it is:

• with a normal verb: you may expect sen
• with pitää / täytyy + infinitive: standard Finnish often has se

This is an advanced object-case point, so it is very normal to find it confusing at first.

Because Finnish often expresses this idea with an active infinitive, even when English uses a passive translation.

• kuivata = to dry something
• kuivua = to dry, become dry

So se pitää kuivata is literally closer to it must be dried by someone than to it must dry by itself.

English prefers the passive here:

• it must be dried on a hanger

Finnish naturally says:

• se pitää kuivata ripustimella

Because the two verbs mean different things:

• kuivata = to dry something
• kuivua = to become dry

In care instructions, kuivata is used when we are talking about how the item should be handled.

Compare:

• Takki kuivuu nopeasti. = The coat dries quickly.
• Takki pitää kuivata ripustimella. = The coat has to be dried on a hanger.

So here the idea is not just that the coat becomes dry, but that this is the correct drying method.

The ending -lla is the adessive case.

Here ripustimella means something like:

• on a hanger
• using a hanger
• while hanging on a hanger

This is natural because the coat is supported by the hanger. Finnish often uses -lla/-llä for surfaces, supports, or instruments.

So kuivata ripustimella means dry on a hanger, not dry inside a hanger.

Because kuivausrumpu is treated as something you dry clothes in.

The ending -ssa is the inessive case, often meaning in / inside.

So:

• kuivausrummussa = in the tumble dryer

This contrasts nicely with ripustimella:

• ripustimella = on a hanger
• kuivausrummussa = in a tumble dryer

Because Finnish often leaves out repeated words when the meaning is obvious.

So:

• se pitää kuivata ripustimella, ei kuivausrummussa

means:

• it has to be dried on a hanger, not in a tumble dryer

The full repeated version would be heavier and less natural. Finnish prefers the shorter contrast.

You can think of it as an ellipsis:

• ... ripustimella, ei kuivausrummussa
• literally: ... on a hanger, not in a dryer

Because Finnish often puts time or background information first.

So the sentence first gives the context:

• After reading the coat’s washing instructions...

and then gives the main event:

• ...I noticed that...

This word order is very natural. It helps the listener or reader understand the sequence of events immediately.