Yes.
It is okay to use Parker pens without Parker ink, but remember to clean them every time you use them to prevent the pen from getting clogged. However, when using Parker pens, it is recommended to use Parker ink. The reason is that using Parker ink can truly experience the fluency and comfort of Parker pen writing, and it will also extend the service life of the Parker pen. Especially for high-end styles, it is best to choose Parker ink. .
The Parker pen adopts a slender traditional pen feed design. An elbow extends from the end of the pen feed. The end of the elbow bends toward the wall of the ink reservoir and is close to the wall. The design, which Parker has an exclusive patent for, theoretically allows the ink to flow back down the bend into the ink reservoir when the pen is out of use. The fountain pen market in the 1920s was highly competitive, and the "lucky curve" was Parker's advantage.
Extended information:
The commonly used colors of ink are red, black, and blue and black. Red ink is generally used for correcting homework and has a limited scope of application. The color of blue-black ink turns blue when first written, and then turns black. It is not easy to fade, and the writing is smooth. It can be used for writing in study and work.
Inks should be of the same brand and color, and cannot be mixed; otherwise, precipitation will occur, which is not conducive to writing. After each writing, the pen cap should be put on in time; otherwise, the ink on the pen tip will dry out and the water will not flow smoothly when writing again. If you want to change to another ink, you should clean and dry the pen before filling it with new ink.
Baidu Encyclopedia-Ink