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Continuing on from Part 1, we've drafted the cups in part 1, now we'll draft the bra wing with gated back fastening, and sew the push up bra.
Drafting the Bra Wing and Gated Back Fastening
Sorry! It's calculator time again. If you have been following the other bra drafting articles you may already understand how to calculate a measurement using a percentage. You will use your "Back Measurement", taken from side breast root, around your back horizontally to your other side breast root (See first Bra article).
Example
If I say "draw a line 32% of your back measurement" the calculation would be:
- Back measurement = 50cm,
- Divide (÷) 50cm by 100 = 0.5,
- Then multiply (x) 0.5 by 32 = 16cm
So the length of the line you should draw is 16cm.
If I say "make the length of a line 17.1% of your Back measurement", the calculation would be:
- Back measurement = 50cm
- Divide (÷) 50cm by 100 = 0.5
- Then multiply (x) 0.5 by 17.1 = 8.55cm
So the length of the line you should draw is 8.55cm.
Here are the percentage measurements for the Wing and Gated back fastening. The Gated back fastening will be made from some of your chosen bra strap elastic with hook and eye tape, or you can use a single "Bikini" hook for fastening.
The wing block is quite basic. You can curve the top and bottom hems ("A" and "D") if you wish, but do not overdo it or you will lose some of the underwire "spring open" elastic tension that you need for a good fit.
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Sewing the Bra
Now it's time to fire up the sewing machine and lay some stitches!
For this bra you will need:
Fabrics, Elastics and Findings:
- Two "plunge" MS09 shape underwires,
- Underwire casing,
- Fabrics for the cups
- Soft stretch fabric for cookie pockets,
- Powernet for the wings,
- Denier lining for the cups (if needed),
- Bra cup foam for cookie push up pads (if needed),
- Plush hem elastics (12mm wide),
- Bra strap elastic,
- 7 – 10 mm wide ribbon or fabric tape (for bridge),
- 3 - 4mm wide strait flat plastic boning (for wings),
- Seam tape (12mm wide NL2),
- Hook & eye tapes or single "Bikini" hook,
- Two strap sliders and two rings (findings),
- Thread (colour matching or contrasting).
For the cookie pads, cut two pad shapes for each pad from bra foam and zig zag stitch or overlock/serge the edges together. I prefer to zigzag stitch as it gives a finer edge. Your pads should be nice cushions; you can also try different materials for the pads such as covered "Fibre Fill".
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Hem the cookie pad pocket openings, then tack stitch the pockets to the inside of the cup lower panels. |
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Use the cookie pad pocket pattern to put alignment marks on the cup lower panels for sewing. In industry, it is usual to "notch" the pattern parts and fabric to aid alignment, you can obtain pattern notching pliers or you can use hand hole punches to punch half a hole on the edge of the paper / fabric. |
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Now sew the together the lower and upper cup panels together at the overbust seam, press open the seam and sew on seam tape. Then fold over and sew down the neck hemlines on each cup and again sew on seam tape over raw edges.
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Before we can sew the underwire casing onto the cups we need prepare and tack on the wings plus the bridge to the cups. First sew plush hem elastic along the bottom hem of each wing, side "A" in the pattern draft. As with the other bras, single zigzag stitch the plush hem elastic to the 5mm seam allowance on the right side of the wing then turn under and sew again using three step zigzag. To get the right stretch to the plush elastic, mark the elastic 1cm shorter than wing hem and stretch sew (see other bra articles for full instructions on plush elastics). Next measure the wing side "C" and transfer / mark on the cups along the 15mm seam. Also mark the position of the bridge, 1cm down from the cup over bust seam. |
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Now tack stitch the wings to the cups, right side to right side and the bridge to one cup. We will sew the bridge to the other cup after we have sewn the wire casing to one cup and turned it under. Sewing the wings to the cups like this will "trap" the wing between the cup and underwire casing when we sew on the casing and turn it under.
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Now we can sew on the underwire casing to the cups. Sew the cup with the bridge first. You may find this easier than sewing underwire casing to a bra with cup cradles as for that you are sewing "blind" . Start by placing the casing plush side up onto the fabric right side of the cup so that the casing is just overlapping the raw edge of the cup fabric. Carefully sew the inner edge of the casing around the cup hem going over the wing and bridge finishing at the centre front.
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Turn underwire casing under to the inside of cup and sew along other casing edge. The wing and bridge will turn into the correct position. |
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You can now sew the free end of the bridge to the other cup, right fabric side to right fabric side.
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And then sew underwire casing to the cup, turn under and sew just as you did with the first cup. You should end up with the cups, wings and bridge all sitting in the right place. You can now see why this style is called "on cup" underwiring.
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Next you can sew on plush elastic to the top hem of the wings and the arm curves of the cups. First cut down the underwire casing at the underarm side of the cups by 12mm, this will make room for the plush elastic to be sewn on and turned down. When you have cut the wire casing, sew across the casing to seal it in readiness for the wires to be inserted at the centre front ends of the casings. |
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To sew on the top hem plush elastic, follow the same procedure as the bottom hem, measure the length of the wing and arm curve of the cup and transfer the measurement – 1cm to the plush elastic then stretch and sew, single zigzag, fold over three step zigzag. You can temporally put the underwires in the casings to check how the cup shape is working, but do not sew the wires in until the end. |
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Gated Back and Strap Attachments
Making the gated back fastening and strap attachments is next, but this complicated by the fact that we will be putting short bones in the ends of the wings.
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Nice one! Can't wait to try making one of my own...