Question

Which of these is not a planographic printing process?

• A. Photolithography
• B. Lithography
• C. Collotype
• D. Xerography

Hint:

Planographic printmaking's core principle is chemistry: oil and water don't mix. Lithography, Photolithography, and Collotype all rely on this. Xerography uses static electricity and toner, a completely different principle.

Answer 1

The Correct Option is D

Step 1: Planographic printing is defined as printing from a flat surface, lacking raised or recessed areas. The image adheres to the surface via chemical means.

Step 2: Evaluate the printing methods.

Lithography exemplifies planographic printing.
Photolithography and Collotype are photo-mechanical derivations of the planographic approach.
Xerography (photocopying) utilizes an electrostatic process, attracting charged toner to an image area defined by light on a photoreceptive drum. Although it produces a flat image, it's not a traditional planographic method, which depends on the oil-and-water principle; it belongs to the digital/electrostatic printing category.