[MR] translation help - aluminic casini

[Becky McEllistrem]

My apologies if I've talked to you about this
privately and you're seeing it for a second time.  I'm
having a terrible time translating one ingredient in
this recipe.  

I can not for the life of me figure out what aluminic
casini is.  I have figured out what blue vitriol is,
and ingredients from a bunch of other recipes but even
in context people are having trouble translating this
one.  I'd love to reproduce this recipe for my
writing.  Anyone know what aluminic casini is?

This is an incredibly cool period reference by the
way.  If you haven't seen it there's tons of stuff in
it!  

Here's the text in context:

The Secretes of the reverend Maister Alexis of Piemont
containying excellente remedies against diverse
diseases… Imprinted at London by Johng Kyngston for
John Wight 1580 


p. 52 A very exquisite sope, made of diverse thinges. 

Take aluminic casini, three ounces, quick lime one
part, strong lie that will beare and egge swimmyng
between two waters, three pottles, a pot of common
oyle, mingle all well together, puttyng to it the
white of an egge well beaten, and a dishe full of the
meale or floure of amylum, and an unce of romaine or
blewe vitriol well beaten into powder and mixe it
continually for the space of 4 hours, then let it
stand by the space of a daie, and it will be right and
perfect, finally take it out and cut it in peeces :
after sette it to drie two daies in the winde, but not
in the sunne, occupie always of this sope when you
will washe your heade, for it is very holesome, and
maketh faire haire. 

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