How to measure the printing mesh
There are several ways to measure the number and thickness of printing mesh
First, the printing mesh cable test piece test
1. The test film is closely attached to the net step, and the negative film is rotated slightly to see the net of the error net. 2. On the opposite side of the wrong network, the number of lines in the network is known.
Second, the magnifying glass measurement method
That is, on the mesh cloth, a 50-times magnifying glass with a mile or centimeter scale can be used to calculate the number of lines by using a fine needle to calculate the number of lines in 1 mm or 2 mm through a magnifying glass. The relative mesh number of the stretch rate. Example: 300 mesh mesh sheet N∕cm tested tensile degree 6 ∕ 100, then 300 mesh ÷ (1 + 0.06) = 283 mesh, and 50 times magnifying glass 0.4 = 1 mm, so 283 mesh ÷ 25.4mm = 11 mesh ( line). Third, mesh or film tester
1. Electromagnetic thickness gauge operation
a: View the machine and connect the test line to turn on the power. b: Take out the stainless steel plate for testing, draw the position, take out the measuring tube and put it on the left side of the test host. c: Take out the standard thickness version suitable for the test thickness. The 1.0 mm copper piece is placed on the stainless steel plate, and the thickness value is adjusted on the right side of the host. d: The test net is placed on the stainless steel, and the thickness of the net cloth can be known by the test tube with an error of 2μ.
e: If the thickness of the film is measured, it must be tested at the coated emulsion. The total thickness minus the thickness of the mesh is the thickness of the film.
2. Probe type film thickness meter operation
a: Connect the power switch and the foot cable and turn on the power of the machine. b: Start the operation power button on the front right upper side. c: Press the probe button at the bottom right and press the probe to zero at the top right. d: Press the probe button again to increase. After multiple detections and zero return, the mesh can be measured. First, use the test piece to measure whether there is any error. e: The left button is a button for storing print calculations.
First, the film thickness test unit is generally measured in μ (micron) as a unit, and 1μ = 1 ∕ 1000mm.
Second, the film thickness should be returned to zero before testing.
Third, when using the film thickness tester, pay attention to the instrument maintenance.
Fourth, when testing the network cable test piece, such as the 150 line, the 300 line and the 75 line have the net flower display at the magnification, so an empirical judgment is required.
It is generally impossible to confuse the 75 line with the 150 line. The line diameter of the 75 line is clearly identifiable, and the 150 line is faintly visible, but the mesh is not visible, and the 300 line is white mist.
5. The tension measuring rod under the measuring disc is a line type. Therefore, it is necessary to measure the tension of the warp and weft of the net cloth. The directionality should be different.
When it is crossed with the warp or weft, it is the direction of measurement.
Sixth, the tension measurement unit of the mesh tension is expressed in %, and the ratio of the front to the back is not measured. Expressed in kg∕cm or N∕cm
Force, generally in Newton (N∕cm).
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