Which is not a typical scale used in blueprint production?

In the context of blueprint production, scales are essential for accurately representing measurements in a reduced or enlarged format, facilitating detailed understanding and construction processes. The scales typically used include architectural, engineering, and metric scales.

Architect scales are used primarily in architectural drawings and are designed with specific ratios to represent the dimensions of a structure clearly. Engineering scales, on the other hand, are commonly utilized in engineering drawings where precision and specific dimensions are critical, often marked in units such as inches or feet.

Metric scales are adjunct to both architectural and engineering disciplines but focus on the metric system — allowing for easy interpretation of dimensions in meters and centimeters.

The term "linear" does not refer to a specific type of scale used in blueprint production. While it may describe a certain method of representing dimensions or distances, it isn't recognized as a standard scale like the others. Linear can refer broadly to a straight line or measurement but lacks the definition and application context that architectural, engineering, and metric scales provide, thereby making it an incorrect option in this scenario.