TL/DR: felt pens…
A pigment liner is a more precisely sized artistic hard felt tip pen…or in this case ‘pens’. I’m lead to understand artists use them to line their artwork. Different diameters for depth and other artsy stuff. I’ve found they’re awesome for creating sharp, contrasting lines on drawings that I convert to .svg files for use with the Shaper Origin or the laser via LightBurn.
I’m a little rough on them, and am certainly no ar-teest, so I bought a set of different thicknesses. It was cheaper to get 6 of varying diameters than it was to buy three of the one I usually use. With the upcoming delivery of the new Shaper Trace plate and software (a faster and cleaner way to take hand drawn ‘anything’ and convert it to .svg), the different diameters might come in handy.
Ryan/// ~sigh~ I blew up another bowl. Moke told me "I made the inside bigger than the outside".