Why are they blobs? Is it because you want to store an array? In that case, a table with a database relation would be the proper way to do it.
In my experience, if you use blobs for anything besides unstructured binary data (images, document files et cetera), you are doing something wrong.
Try to aim for third normal form (http://en.wikipedia.org/wiki/Third_normal_form). It's a reasonable trade-off between theory and practicalities in database design in typical real world scenarios.
I would convert them to hex and store as string. If nothing else, I'd do it because they'd be readable in the database, which makes debug sooooo much easier.