The difference between sashiko thread and kogin thread

Kogin thread and sashiko thread look very similar, but there is a distinct difference in how they are twisted. Find out when to use which.
At first glance sashiko thread and kogin thread look very similar. | Similarities and differences between the two

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Wholesale Price 5rolls Home Make Cup Pad Sew Material Blue Purple White 10 Strands Sashiko Thread Kogin Sewing Thread A0445l - Diy Craft Supplies - AliExpress

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The difference between sashiko thread and kogin thread

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Do you use batting for sashiko?