I equipped myself with the finest dip pen nib I could find.
Spirit - based gutta is a liquid latex rubber which is applied to the silk using a small bottle fitted with a metal nib.
Today they're double-ended, spherical or shaped into a tiny nib.
Most of the fabrics are typical York products and probably belong to peg tile, rather than nib.
Next follows the operation of cleaning, in which the silk is simply reeled from one bobbin to another, but on its way it passes through a slit which is sufficiently wide to pass the filament but stops the motion when a thick lump or nib is presented.