Is it effective for Apple's invisible ink SMS to be forwarded to others?

Only iMessage can send ink information.

If the other party is not an iPhone or the iMessage function is not turned on, the effect will not be displayed.

I only get regular text messages.

You can see whether the message sent is blue or green.

The blue one is iMessage

Explain that the other party can see the ink effect.

Green means you can't see the phone when sending ordinary messages. If it is confirmed that the other party has no iMessage function, it will be automatically converted into an ordinary message.