On Crimson Ingot you are able to craft more recipes than you can in Vanilla.
Sand from Sandstone
Red Sand from Red Sandstone
String from Cobweb
Cobweb from String
Craft 1 'Baited Rod'. (Craft 1 worm + 1 fishing rod --> 'Baited Rod'.)
Cobwebs can be crafted by Cavilon followers. (Craft 1 string)
Extra nether brick blocks can be crafted by Netharna Followers by filling all Crafting table spaces with Nether Brick (item, not block)
Sod can be crafted by Wildaven followers.
Packed ice be crafted by Wintival followers.
Chain Links and Chainmail
Craft chainmail with these chain links just as you'd craft any other armour.