Encryption column level and unencrypted dump files

Can someone who uses this confirm this:
 
If I have a database using column level encryption and I take a Data Pump 
export to an unencrypted (no password) export file, when I move that 
unencrypted file over to another database which has a wallet and import it, the 
columns will be encrypted again even though the dmp file itself was not 
encrypted (password protected).   Is that correct?      This is 10g 
environment.

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