1) More stitches per inch = stronger seams and a higher quality item.
2) Luxury designers manufacture the highest quality items.
3) Therefore, luxury items should have more stitches per inch than lower quality items.
3.1) Counterfeit items are generally lower quality items.
3.1.2) A counterfeit item's spi count should be lower than the authentic item's spi count.
The yellow and purple filters are an authentication tool that compares authentic bags to similar but unverified handbags. An
unknown handbag that misses the target spi is considered a red flag.
1) Measure a distance (between 1-3 inches) on the authentic bag's seam and count the number of
stitches in that area. Enter that number into the SpI
2) Measure the bag in question's seam line (using the same distance from step 1), and count the number of stitches in that area.
Enter that number into the X
box. (Distance measured must be the same as in step 1. Both bags
should be of the same designer and similar style. If you are authenticating a Speedy 30 bag, try and find an
authentic Speedy 30 or 35 bag for comparison etc.
3) Press calculate.
4) The filter should output a pass or fail reading.
) Use the yellow filter if either of the spi values are less than, or equal to 15.
) Use the purple filter if both of the spi values are greater than 15.
The output is just a guideline, and not 100% conclusive. That said, if a bag fails (considering
everything was measured and input accurately), that negative output should give rise to caution. Further scrutiny of the handbag is always
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