915
21 demonstrates the process in which the inkjet deposited material on the bed , prior to photopolymerization of the film by UV light , forms a layer .
 concept or principle: process; manufacturing process: inkjet; material: material; machine or equipment: bed; manufacturing process: photopolymerization; enabling technology: UV light; process parameter: layer
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 concept or principle: process; manufacturing process: inkjet; material: material; machine or equipment: bed; manufacturing process: photopolymerization; enabling technology: UV light; process parameter: layer