Sett size??

[Paul Henry]

Sett size gives the formula that is made of thread count and colours used to make a tartan. once the formula is sett and registered, IT CAN NOT BE CHANGED and be what it was named as, to change the formula or sett, you will make a completely new tartan. the only way the set is changed is the ounce of the thread used to make the tartan. a 10 oz is smaller, therefore the tartan sett size is smaller then aa 22 oz thread and so on...there is NO OTHER WAY TO change the sett size for a given named tartan. hope this helps you. You can always create a new tartan based on an original tartan, by change in the number of threads per colour and repeat the pattern, but if it is to close to the original tartan the Registry of Tartan, may not pass if for registration.

Gary , I afraid you are quite wrong with this, it is indeed very common for weavers to increase proportionally a thread count, and as David has said even sometime they can slightly alter the number of threads in a block of colour. It is exactly this that sometimes causes problems in identification of names ( as in a current thread by Barb).
But the bottom line is that a thread count IS a formula that can be increased to make extra large setts if required and still be called by the same name , and it does not affect the name or any of the registration details.