Agitator Pros: Partha Raghunathan (left) and Eric Katzenberger possess the energy and innovation of a start-up duo. Raghunathan holds down the business side, and Katzenberger masterminds laundering and deliveries, aiming for a gentle ecological impact. The slogan for their home service: “control-ALT-delete the paper towel.” A Dirty Story About Clean Linens Inside the messy battle between an international napkin cartel and a local upstart trying to claim its share of Dallas’ dining room tables. The space inside ALTLinen’s Design District warehouse on Crampton Street is filled with a blur of white. In this serene temple to textiles, laundry tumbles in machines capable of washing 100 pounds at a time. Voices are muted over the whir of a steam press that handles a sea of bleached fabric punctuated every once in a while by a blue stripe.