Disappearing hour glass pattern
#12
Well - for sure you cannot start with 2 10" squares and come out with a 12 1/2" block. You can't even start with 2 12 1/2" blocks and do it with all the cutting and sewing back together - looks like a good math equation, algebra anyone? Will look forward to seeing your final answer.
If you cut each into thirds, you'd have 18 squares that are about 3 1/3" square. From 15 of those you could sew a block that's 5 x 5, which would turn out to be about 11 1/3" square. I think you'd have to cut them so that you could use the maximum number of the squares that you cut.
Very interesting...
#13
I practiced using 11 1/2 block to start with and it was "almost" right for 12.5 but not quite so I looked thru my patterns and found one that used 4 1/2" blocks, 3 rows to make a 12.5 and had the 2 1/2" x 4 1/2" rectangles so instead of making an hourglass and then cutting it I just made it using a combination of patterns.... I also made one but I think the darker and white is much better than the lighter and white. Thanks for all the suggestions! I will definitely make the disappearing hour glass using the 10" blocks like in the video some day! Not sure what size it turns out but if its ALL the same size it wont matter
#15
The reason you can start with a 10" and end up with a 12.5" block is because you are starting with TWO 10" blocks one on top of the other. After sewing them together and cutting you open them up which gives you the full size of both of the blocks minus your seam allowances. In reality you're starting out with the equivalent of a piece of fabric that is 10"x20" and shrinking it down through cutting and seam allowances to a 12.5" square.
#18
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Join Date: Jan 2011
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I don't remember where I found the chart. It's free to share as far as I know.
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