Pricking Irons SPI

[67flh]

I am looking to purchase a pair of KS pricking Irons, my main usage will be for wallets and card holders. Is there a consensus out there for how many SPI at a maximum/minimum one would use?  I am looking at 6.5 per inch but think the  7.5 would look more refined.

Edited January 26, 2020 by 67flh

[HaloJones]

Depends on the size of your thread I would say

[Zonker1972]

about 1/2 way down the page ian has a table that may be helpful.

https://www.ianatkinson.net/leather/leatherguide.htm

for that application he suggests 8-9 spi

[67flh]

2 hours ago, Zonker1972 said:

about 1/2 way down the page ian has a table that may be helpful.

https://www.ianatkinson.net/leather/leatherguide.htm

for that application he suggests 8-9 spi

Perfect, thank you very much!!

[Tugadude]

Also check Nigel Armitage's reviews.  He discusses those irons and SPI, size of thread, etc.. Look it up on youtube.

[67flh]

19 hours ago, Tugadude said:

Also check Nigel Armitage's reviews.  He discusses those irons and SPI, size of thread, etc.. Look it up on youtube.

Thanks for the tip, those are great videos!

[Tugadude]

The great thing is that not only does he show the irons, he demonstrates how they function and then how the finished qualities appear, often with varying sizes of thread.