How does a Bless Spell work when cast on items?

Question

A Bless spell can be cast upon an item to make it blessed. Examples would be a blessed finely cured piece of leather for an Armor spell or a blessed crossbow to slay a Rakshasa. I'm not clear about how Bless spell applies to items used in this nature.

Does the blessing last only as long as the spell, requiring a cleric to cast a bless spell prior to those items being used? Or can you just cast a bless spell on a piece of leather or crossbow bolt and it's considered blessed from then on?

Furthermore, how many items can you bless with a spell at one time, since bless is usually an area effect spell that boosts allies? Can it be cast on a pile of leather scraps and crossbow bolts or only one at a time?

I don't see where it's clear in how to use bless when required for reasons other than blessing the party.

Answer 1

The text on Bless is pretty explicit.

A second use of this spell is to bless a single item (for example, a crossbow bolt for use against a rakshasa). The weight of the item is limited to one pound per caster level and the effect lasts until the item is used or the spell duration ends.

You Bless one crossbow bolt, scrap of leather, etc that is no larger than 1lb per caster level. It remains Blessed until used for its purpose or 6 rounds.