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<\/p>\n
Why Does the Fold Shine Before the Ridge Opens?<\/h3>\n
A shine along the fold is the nap laid flat, and no setting change removes the mark afterwards. On a hairy tweed the press crushes the fibre ends on the ridge while the cloth either side keeps the lift. The ridge then reads paler or darker under raking light, and the surface beside the ridge does not. A mirror across the pleat line is the same class of fault on a check, because the pleat has to sit on the repeat or the pattern doubles at the seam and the skirt reads as two cloths. In practice, set the pleat line on the cloth before the pleater sees the roll. First, mark the fold on the reverse in chalk. Second, photograph the check across the fold and cut the trial on the marked line. Finally, compare the pressed piece against an unpressed length from the same roll, in one light and at one angle.<\/p>\n
Gate Three: What Heat History Is Already in the Cloth?<\/h2>\n
A prior heat set is a ceiling, and the pleater has to exceed the last thermal step to move the cloth at all. Exceeding the ceiling costs hand and surface. Excessive heat or tension gives stiffness and gloss, and a thermoplastic fibre under a hot press can shrink or deform. Resin, calendering or a heavy softener changes the answer again. For example, a durable-press finish has already asked the cloth to hold a shape. The finisher\u2019s sequence is the document gate three needs, not a fibre list. First, ask for the last thermal step in the route. Second, ask whether the cloth was dried under tension. Third, ask whether any resin or softener went on after dyeing. In 2026 a finish often arrives described as a name rather than a sequence. A pleater who cannot name the ceiling is pressing blind. Shape lost after wear belongs to the same family of question, set out in shoulders that collapse after two wears<\/a>.<\/p>\n The trial has to be sized, sourced and recorded before the press is warm.<\/p>\n A trial length is a production-run piece, not a sample, and the cutting plan decides how much cloth the question costs. Cut from the roll end at full width, and run longer than the finished panel, because the pleat consumes length as the cloth folds back on itself. One skirt\u2019s worth is the natural unit: enough cloth for the pleat geometry the bulk will use, plus a pressed control and an unpressed control from the same piece. Write the cut position on the roll ticket. For example, a failure found at the roll end costs one skirt\u2019s cloth, while a failure found after the lay is cut costs the lay. Read the free-steam response on the same piece before pressing, per ISO 3005<\/a>, which sets out the free-steaming method. Finally, repeat the reading after the care route.<\/p>\n The record is the only part of the trial that survives the skirt, so the record carries every setting the press applied and every reading taken afterwards. Write the lines in order, and photograph each piece beside its control.<\/p>\n Finally, repeat the care route on a second pressed piece and take the same readings again. A record without the control proves nothing, and the mill pretest for boucle coats in the boucle pretest protocol<\/a> rests on the same rule.<\/p>\n The pleated piece is the object of acceptance, not the flat cloth, because the flat cloth answered its own questions. Hang the pleated piece, press the pleated piece, sit on the pleated piece and clean the pleated piece. Then read ridge retention, depth evenness across warp and weft, shine along the fold, panel length change and smell after cooling. Four lines go in writing before 60 metres are cut. First, the setting mechanism. Second, the trial result beside its control. Third, the acceptance readings and who signs them. Fourth, the remedy when a ridge opens in the first month of wear. The care route decides much of the last line, as set out in care labels and sew flatness<\/a>, and a piece changing length after cleaning is a returns question rather than a pleating question, covered in cloth or care<\/a>. Residual smell belongs in the record too, because thioglycollate impurities left a residual odour in garments treated in the USA (Ward 2018), solved by a switch to monoethylamine sulphite.<\/p>","protected":false},"excerpt":{"rendered":"How Do You Size and Run the Trial?<\/h2>\n
Where Does the Trial Length Come From?<\/h3>\n
What Goes in the Trial Record?<\/h3>\n
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What Do You Accept, and What Goes in Writing?<\/h2>\n