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		Scraping of plane surfaces - Course: Technique for manual working of materials. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 14 p.)
			(introduction...)
			1. Purpose of scraping
			2. Tools for scraping
			3. Purpose of inking
			4. Testing and auxiliary equipment for inking
			5. Operation of scraping
			6. Technological process of planing a plane surface
			7. Additional recommendations

3. Purpose of inking

Inking is the technique of testing the quality of scraped surfaces by checking them against roaster plates. With the help of roaster plates and ink, unevennesses and faults of shape are made visible on the surface of the workpiece. Inking and scraping alternate with each other. The combination of inking and scraping characterizes the actual working process and is called “planing”.

Figure 7 - Inking of a workpiece