How to Store Starched Altar Cloths

100% pure linen.  You need a large table to dry them on, after you launder them by hand.  When they are dry, roll them and keep them flat in storage, as seen here.

As someone who has seen the Shroud of Turin twice, altar linens have taken on a new meaning.  They symbolize the burial shroud of Christ.  They are blessed objects and are to be maintained with great dignity.