Slate inspection way： eye inspect to check the appearance and quality

     Flatness inspection:

     Put the steel ruler on the two diagonals of the surface, use vernier caliper to check the distance between the ruler to slab surface, use the maximum measure size to show the flatness of the slab, the accurate rate is 0.1mm.

     Angle inspection:

     Use 90 degree steel angle ruler (inner angle vertical tolerance 0.13mm, inner angle border length 500x400mm) to measure, move the short border of ruler to the slab’s short edge, ruler’s long border to be close to slab long edge, use the vernie caliper to measure the max distance between slab long edge and angle ruler’s long border. When the slab long edge is smaller and equal to 500mm, could measure any slab angle, while if the slab long edge is longer than 500mm, the measure the slab’s  4 angles.

     Use the maximum measure size to show the slab angle tolerance, the accurate rate is 0.1mm.

     appearance quality inspection:

     1. for color,  put the standard product and slab to be inspected together on the floor, check it by eye from 1.5m distance .

     2. chisel trace, put the slab on the floor, check by eye from 1.5m distance.

     3. color line, check by eye to see how many color lines.

     4.Corner and edge breakage, use vernier caliper to measure the defect’s length, width and height, check the defect quantity by eye.

     5.Use vernier caliper to measure  Stair step’s height, measure the maximum value as the step’s height.

     6.Crack usually could adopt checking by eyes, or hammer knocking method (ie, use metal hammer to know the slab, through the sound, damp sound, to identify whether it exist the the crack).

     7.Use vernier caliper to measure the color spot. And check the quantity by eye.

Previous Article:Micro-crystal stone   

Next Article :Some issue required to be paid attention on artificial stone