Mastication Publications (est. 1991) is a line of special projects (mostly ebooks, broadsides and limited-run chapbooks) independently produced and sold by Michael Arnzen and Renate Muller (Arnzen).
The press is not not open to unsolicited submissions. All projects that involve collaborators are by invitation-only.
Currently Sportuary (2009), an ebook by Michael Arnzen, is in print and available exclusively on amazon.com. Their legacy titles include early horror poetry books: Chew and Other Ruminations (1991) and Psychos: An Anthology of Psychological Horror in Verse (1992) — along with a number of limited edition broadsides (you can see copies of some of these on scribd.com/Arnzen)
The press plans to renew and expand in 2013, through ebook and other ephemeral publishing avenues.