If both of your adults are het albino you will get 25% albino and the rest will be 66% possible het albino.
If you wanted 50% of the offspring to be albino you would need one of the parents to be albino and the other parent to be het albino.
But you might get lucky and hatch out a albino supertiger from your pair. If your parents are het for the Clark strain you could get any of the three colors of albino as well.
I love breeding hets as you never know what you will get

Allen Sheehan