Noodler's Polar Brown Ink - 88ml Classic Sport Mechanical Pencils The pen also comes with

The pen also comes with a brush tip and can be swapped out with the rollerball tip

That can be a little daunting

although they still be slightly affected

warm purple fountain pen ink with low shading and medium gold sheen

Noodler's Polar Brown Ink - 88ml Classic Sport Mechanical Pencils The pen also comes withReformulated in 2006, Noodler's Polar series inks feature faster drying times and improved flow, designed as basic freeze resistant inks to prevent barrel cracks in pens and broken bottles during cold weather. Although they cannot guarantee complete immunity from freezing at any temperature, these inks are engineered to withstand the damaging expansion that water based products often experience when exposed to freezing temperatures and harsh winter