Main technical parameters:

1. Spray nozzle: single station independent stainless steel nozzle;

2. Spray reagent: Dissolve 500mL of water and 5g of phenolphthalein in 500mL of methanol;

3. Spray speed: 20-30ml/min;

4. Spray distance: 600mm;

5. Spray pressure: vacuum pump pressure control, constant pressure adjustable;

6. Spray flow: (0.5 ± 0.1) mm/min Within ± 2 seconds;

7. Spray time: 10 seconds;

8. Test head mold: made of silicone material;

9. Head mold clockwise or counterclockwise rotation: 90 °;

10. Covering velvet fabric: surface quality 185g/㎡;

11. Interval test paper: approximately 180 mm x 100 mm white water paper, immersed in a 0.1mol/L sodium carbonate solution;

12. The inner box is made of stainless steel and equipped with drainage and water storage devices;

13. The outer box is made of steel spray painted, with casters installed at the bottom and an observation window;

14. Equipment power supply: AC220V 50Hz。