Don McCunn's Blog

Heat Sink Cord Finish

One of my frustrations has been to have a nice finish to the ends of elasticized cording for swim suits. For some time now I have been meaning to try heat shrink tubing. I finally did it the other day and was very pleased with the result. It is very similar to the finish on shoe laces. Heat shrink tubing comes in a variety of sizes and colors, even clear. It is available form hardware stores and Radio Shack.

Here are the steps I followed:

In the example below I tied the cording to the ring, then slipped a length of heat shrink tubing over the elastic and did the heat shrinking. I like the way it encloses the entire elastic. Had I wanted to I could have used a longer length of tubing and enclosed the elastic all the way to the ring.

“X” Back Bikini Top

My model Alex mentioned that she would like a swimsuit that did not have a strap around the neck. The photos below show what I created. The ties go from rings in the front, across the back to the opposite side, then back to tie at the rib cage level at center back. Once we had the elastic adjusted to her preference, I tied the elastic to the rings on the sides. All she has to do to take this top on and off is to tie and untie it at center back.

The top itself is made with velvet Lycra from one of the Fabric Depot Valu-Packs. I used a princess seam for the bikini top for optimum shaping. In this example I used 1/8″ elasticized cord. With the ring design it would be easy to change this to wider straps if so desired. Actually the rings give this particular design a lot of flexibility. The swimsuit rings also came from Fabric Depot.

Changing One Dart to Two

I am working on a design concept for custom-fit bras based on the Bust Sling from my eBook How to Make Custom-Fit Bras. This design lends itself quite naturally to a bra for nursing mothers. A neighbor of mine is about to give birth to her second child. She has graciously agreed to test this concept for a bra. She has indicated that she prefers nursing bras that have foam in the covering portion of the cup.

As I was developing the pattern for the foam for this design I found it was going to have a rather large dart. In the past we have discussed in my group How to Make Sewing Patterns the problems of darts for women with larger cup sizes. They can become quite pointy.

I decided to tackle the problem of changing one dart to two for this particular design. I wasn’t sure how to best approach keeping the shape while changing the dart. I like to advocate the use of poster board to test out pattern shapes. Particularly for the complex curves of bra patterns. The photo below shows the evolution of changing a single dart to two darts.

Here are the steps I followed:

1. The first photo shows the shape of the pattern for foam with a single dart.
2. I wanted to spread the distance between the two darts based on the Bust Circle which I describe on page 58 of my book How to Make Sewing Patterns. I opted to spread the darts by 5/8″ to either side of the existing dart. Those are the two pencil lines in the second pattern that are parallel to the sides of the dart.
3. I taped the single dart in the poster board closed, then cut along the two lines from the step above. I flattened the poster board.
4. When I made this pattern I discovered that the bottom curve of the pattern needed to be adjusted slightly when the poster board was flattened. Both the body and fabric have give. This minor change in the shape of the pattern does not concern me. I show this adjustment to the pattern with the red line in the fourth pattern above.

The last two images compare the poster board shapes of the one dart and two dart shapes. I was pleased enough with the results that I decided to make them up using the swimsuit techniques I describe in my eBook How to Make Bikinis and Bandeaux.

The final test will be to see which of these two styles looks best on my neighbor with her input being crucial to the final decision. I am intrigued by the process of exploring pattern shapes as a collaborative process with the person who will wear the final garment. I recommend that if you follow this procedure, you take it in the kind of small steps I have indicated here. I would be very hesitant to change my concept if this was the final product. But it isn’t. It is just one small step in a larger process.

If you are interested in learning more about the evolution of this particular design, I am sharing the process with my Yahoo group How to Make Custom-Fit Bras.