Dials with Debossed Numbers for Curta Calculator Type I scaled at 3:1

thingiverse

While crafting my 3D Printed Curta Calculator, I discovered a major obstacle: there was no simple way to apply paint to the numbers on the selector and result dials. To solve this problem, I designed custom dials with the numbers recessed into their surfaces. Next, I roughly painted the dial faces with acrylic paint and then carefully wiped away any excess paint using a damp cloth, leaving behind only the paint that had settled into the number grooves. It's crucial to thoroughly sand the dials beforehand, as the paint can easily become lodged in tiny print imperfections.