how to keep clean a razor for a long time

[Oustoura]

hi everyone,

missed you. i've been away for few months, i was busy with my works. last week, i took a look to my razors (about 150 pieces of razor). i was cleaned them and put on them some vaseline/paraffin oil to keep them away of humidity and all the pieces are in a airless package (vacuumed bag like in the picture). well, few pieces of my collection got some rust on the spine.



i afraid to happen the same thing on my others razors. would you have any ideas to keep them surley in safe and far away from rust?