Final answer:
The concept of pouring impression can refer to capturing raindrop imprints in soft sediment, a printing process that creates textured images, and demonstrations of liquid dynamics, as well as the pouring of molten metal in the lost-wax casting process.
Step-by-step explanation:
The question 'How to pour impression?' relates to the process of capturing the form of raindrop impressions, which are concave marks created by rain on soft sediment and can serve as good way-up indicators.
Moreover, the question mentions pouring liquids from a measuring cylinder to a column and from a faucet into a glass, and pouring molten metal for lost-wax casting sculptures, all of which are various methods and demonstrations of pouring techniques.
For raindrop impressions, find suitable soft sediment and observe the imprints after rainfall. For printing techniques, prepare a plate with resin powder and acid to create a textured surface, ink it, wipe it, and then press a paper against it.
For demonstrations of liquid dynamics, pour from a measuring cylinder to a column or from a faucet into a glass, closely observing the fluid behavior. For lost-wax casting, pour molten metal into a sculpted mold after melting out the wax.