b'This resulted in a 75% reductionFigure 5. A in CD weight two-sigma aftergraphical approximately 15 minutes ofdescription of the definition production. of: (a) crepe In another example, a tissuefolds per manufacturer reduced the drycentimeter (cm) or inch, (b) weight target by 0.2 to 0.25 unitsMacro crepe, with no compromise in quality,and (c) Micro while also seeing significantcrepe.financial return, in the form of fiber savings and increased production rate.The installation of a Devronizer steam box solution for CD moisture control on a tissue machine enabled a moisture increase of 0.7%, from 4.5 to 5.2%, allowing for a 9% speed increase.Installing Devronizer on the suction pressure roll on a tissueFigure 6. A trend plot of macro crepe, blade change, basis weight, and moisture machine reduced Yankee steamon a tissue machine equipped with a crepe structure sensor. Note that the peaks in the red line indicate blade changes. The macro, or coarse, crepe also usage by 31%, with CD moisturedrops dramatically at every blade change. That is to say the crepe becomes less variation (two-sigma) reduced bycoarse when a new creping blade is inserted.77%.CONCLUSIONTodays advanced QCS technology can help manufacturers in the tissue and towel industry maintain the highest quality standards, while also addressing production challenges such as variation in both MD and CD crepe quality, and, at the same time, meeting stringentFor more than efficiency requirements associated withfive decades, fiber, energy and chemical costs. Honeywell has For more than five decades, Honeywelloffered has offered tissue/towel measurementmeasurement and control solutions to improveand control the performance of tissue machinesolutions to operations around the world. Theseimprove the solutions enable manufacturers toperformanceFigure 7. A folds-per-unit-length color mappresents the crepe profile for the achieve superior quality in terms ofof tissuelast 50 scans, with the oldest scans at the top of the window, and the latest scans at the bottom. Note the coarse crepe, that is, low folds per inch, at softness, strength and bulk, as well asmachinethe top, before the creping blade was changed, with even more coarse crepe ensuring highly automated downstreamoperationsat the edges. There are also significantly higher folds per inch following the converting operations run at higharound theblade change and the significant crepe profilewith much higher folds per inch in the middle of the sheet as compared to the edges. Moreover, the efficiency. world. crepe profile flattens significantly after about 30 scans.TISSUE TECHNOLOGY INTERNATIONAL71'