Overview
SHIBO QXD-25 Grindometer is designed according to the standard GB1724-79 issued by the Ministry of Chemical Industry, which is used for inspection of the fineness of pigments, fillers and impurities in Paints and lacquers, expressed in microns.
Features
1. The size of the scraper is 155 × 50 × 12mm, and the size of the chute is 13 × 120mm.
2. The slope ratio is 1:4000, and the scale value is 5 microns
3. Drawdown blade size is 68 × 40 × 6mm long
4. The plane straightness on the scraper is 0.003 mm, and the plane straightness of the QXD-25 is 0.002 mm
5. The flatness of the bottom plane of the chute is 0.003 mm, and the flatness of the QXD-25 plane is 0.002 mm.
6. Drawdown blade two edge plane flatness 0.002 mm
7. Scraper upper plane finish 10, chute bottom surface finish 8, Drawdown blade two edge finish 8
Principle
Drawdown blade is used to scrape the paints sample from the depth of the chute to the shallow point uniformly, and observe the scale line where the particles in the chute are uniformly exposed.
Applications
Paints inspection, paint paste inspection
Steps
1. Wash the scraper and Drawdown blade with gasoline first, dry it with cotton yarn, and then wipe it with deerskin
2. Dip the well-mixed paints to be tested with a Glass stick and drop them into the deepest part of the chute on the scraper
3. Place the Drawdown blade horizontally on the top of the Drawdown blade with both thumbs, index fingers and middle fingers, so that the edges of the Drawdown blade vertically contact the surface of the Drawdown blade
4. Pull from the depth of the chute to the shallow
5. Observe the scale line at the uniform exposure of particles in the tank within 5 seconds and read the value
Notice
• Thoroughly clean the scraper and Drawdown blade with gasoline before use
• When drying, use cotton yarn first and then deerskin.
• The amount of paints dripped is to the extent that it can fill the chute with a little excess
• Drawdown blade edges must contact the surface of the Drawdown blade vertically
• Observe the reading within 5 seconds after scraping
