As I mentioned above I’m horrible at documenting… So, thank you
@John Hendrix for reminding me.
Therefor, I spent the day making rope in order to create a reference library of rope each thread size results in.
I like working with cotton thread since I can secure the knots and ends with PVA glue. (I’m horribly allergic to CA glue and accelerator) also, it’s much easier to dye to the color I want. I primarily use DMC Cordonette Special although it is no longer imported into the US ( Bummer
) and getting difficult to find at a reasonable price.
Since the thread really is miniature 3-strand Z layed “rope” I can use the individual thread sizes right out of the package for 0.15mm up to 0.45mm.
Using my ropewalk I can get from 0.50mm up to 1.25mm in about 0.05mm increments. I could get larger diameters if needed by going to 3/3 or even 4/3 strands. Once passed through a diluted PVA bath there is very minimal fuzzing.
You are correct that sewing thread are measured in various ways that to the untrained eye make absolutely no sense. I did find this article that helps provide some information and I’ve used it to compare various manufacturer’s thread sizes.
https://en.wikipedia.org/wiki/Units_of_textile_measurement
To measure my thread diameter I simply wrap 10 coils around a dowel and measure with a caliper and divide by ten. Works close enough for me.
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Ok, enough playing around! On to the running rigging!