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Place the front sides of the two layers of fabrics facing each other, and evenly tie a thread on the back side according to the specified seam allowance. The width of the seam allowance depends on the thickness and tightness of the fabric texture and the area, usually 0.8-1.2cm.
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Firstly, the sewing edge of the fabric shall be ironed back according to the specified seam allowance, then it shall be placed at the specified position, and 0.1cm open line shall be hung on the folding edge.
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Place the front sides of the two parts facing each other and overlap them. The lower part is 0.8cm more than the upper part, turn it to the upper layer, the stitch is 0.1cm away from the sidecar, and then fold the overlock, cover the burrs, and sew a 0.6cm open stitch on the front.
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Difference: After facing and overlapping the opposite sides of the two parts, the lower part is 0.8cm more than the upper part, turn it to the upper layer, the stitch is 0.1cm away from the sidecar, and then fold the overlock, cover the burrs, and sew a 0.6cm open stitch on the front.
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① After facing and overlapping the opposite sides of the two parts, open line 0.5cm away from the edge, and then trim the seam allowance to 0.3cm.② Turn the two sewn parts over to face each other, tidy the seam edges by hand, then sew a second seam along the edge 0.6cm without exposing the lint from the first seam.
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Fold the front sides of the two back parts facing each other, sew an open line along the edge first. In order to reduce the thickness of the seam allowance,Flat sewing is to place the lower seam head by 0.4cm ~ 0.6cm, sit down in the downward direction after sewing, and press an open line on the front so that the large seam covers the small seam.
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First refract the rough edge of the garment piece to the opposite side (the folding amount varies from 0.3cm, 0.5cm, 0.8cm and 1cm as needed); Then turn the welt to the opposite side and turn it by a certain amount (the amount of welt varies from 0.5cm, 0.8cm, 1cm, 1.5cm and 2cm as required), so that the rough edge of the garment piece is rolled inside; Finally, an open line of 0.1cm is wanted along the welt.
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