Quills or feathers {pen, writing}| can hold ink in hollow insides [500].
Pens {ballpoint pen}| can have a rough-surface steel ball at tip. Thick ink is on ball.
Pens {fountain pen}| can have rubber sacs to hold ink or have replaceable ink cartridges. From ink sac, a capillary tube leads to point {nib, pen}. Nib is flexible and has a split down middle lengthwise. Slit acts like a capillary tube to draw ink forward. Plastic under point {comb, pen} stores ink. Pressure or temperature change forces ink out reservoir.
large hollow feather used to draw ink for writing {quill}.
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Date Modified: 2022.0225