The earliest kind of print technology developed in China, Japan, and Korea was woodblock printing.

Woodblock Printing:
Woodblock printing was developed in China during the Tang Dynasty (618-907 AD) and later spread to Japan and Korea. This printing technique involved carving characters or images into a block of wood, applying ink to the block, and then pressing it onto paper to create a print.

Process:
1. Carving: Skilled artisans would carve characters or images into a block of wood, usually made of cherry or pear wood.
2. Inking: The carved block would then be inked using a brush or roller, ensuring that the ink covered the raised surfaces but not the carved-away areas.
3. Printing: Paper or fabric was then placed on top of the inked block, and pressure was applied to transfer the ink onto the material. This process could be repeated multiple times to create multiple prints.

Usage:
Woodblock printing was widely used in East Asia for printing texts, images, and patterns on paper, silk, and other materials. It played a significant role in the spread of knowledge, art, and culture in the region.

Impact:
This early form of print technology revolutionized the way information was disseminated, making books and other printed materials more accessible to a larger audience. It also influenced the development of later printing techniques, such as movable type printing.
In conclusion, woodblock printing was the earliest form of print technology developed in China, Japan, and Korea, and its impact on the spread of knowledge and culture in East Asia cannot be overstated.