From a Jesuit priest…
I have a question regarding purification: In the Vetus Ordo, it is customary to purify the paten with the thumb and index finger. What is the correct way to purify a ciborium? In the Novus Ordo, the ciboria (as well as the paten) are usually purified with the purificator. I have done this since my ordination, but since I started celebrating the old rite, I have been wondering if this is correct (and if it is correct to purify the ciborium with the purificator in the old rite) since there will inevitably be particles that get stuck or remain on the purificator. Many thanks in advance!
Father, I commend you for asking. Thank you. You are right to wonder about the use of the purificator for particles of the Eucharist in a ciboria. For the life of me I cannot figure out how any priest could think it is a good idea to use a purificator to wipe out a ciborium… unless they don’t believe that those particles are Eucharist.
No. Do not use the purificator. Use your index finger to move as much as you can out of the ciborium into the chalice. Then, when you purify your fingers, purify them over the ciborium and then pour the contents from the ciborium into the chalice.
Here is a helpful little video, in which I go through the procedure with some incidental remarks.