In the course of printing experiments, we often encounter problems related to ink skin testing, and these contents are rarely encountered in general professional books. So what are the printing principles and experimental equipment and processes related to skinning? Bisheng Editor shares with you:
1. Principle
The ink sample of a certain volume is expanded into the diameter of the cylinder and the degree of diffusion under a specified pressure over a certain period of time, expressed in millimeters.
2. Tools and materials
(1) Conical steel body with black handle and wooden handle, 200mm long, 20mm widest and 8mm narrowest.
(2) Glass plate 200mm × 200mm × 5mm.
(3) For ethanol industry.
(4) Cotton yarn.
3. Instruments
(1) The fluidity tester consists of a fifth-weight with a mass of (200 ± 0.05) g; a mass of (50 ± 0.05) g, a thickness of 5-6mm, and a diameter of 65-70mm round glass; two metal fixed discs A composition.
(2) The capacity of the ink suction tube is 0.1mL.
(3) The division value of the transparency scale is 1mm.
(4) Set the clock.
4. Inspection conditions
The inspection shall be carried out at a temperature of (25 ± 1) ° C and a relative humidity of 65% ± 5%.
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