Method and sequence of work.
Recommended haircut
haircut
Ra
Rz
0,08 mm
<0,02 mkm
<0,1 mkm
0,25 mm
0,02~0,1 mkm
0,1~0,5 mkm
0,80 mm
0,1~2,0 mkm
0,5~10 mkm
2,50 mm
2,0~10 mkm
10~50 mkm
In
the report, the arithmetic mean value of the
parameters measured on both
sides of the paper is given and the level of paper finishing is given.
Job report
1. Find this site for regulatory documents.
2. Draw a conclusion based on the obtained results.
Control questions:
1. What technical means are used to determine the gadir?
2. Give the unit of measurement for this.
3. Bring paper technology to Gadir.
4. What is the function of the super calender?
5-LABORATORY WORK
STUDY OPTICAL PROPERTIES OF PAPER
The purpose of the work: to get acquainted with the methods of evaluating the
whiteness and transparency of paper using the Spectrodensitometer ET-120HD, to
study the optical scheme of the densitometer.
Tools and equipment:
Spectrodensitometer ET-120HD
Field of application
The densities of the areas of the scales in the
copy are controlled using a
densitometer. Changes in dye transfer by density values are easily detected.
In order to measure copies made on different
colors of printing inks,
light
filters are placed in the densitometer in the path of
rays coming from this light
source. Color filters are adapted to the spectral properties of triad colors (CMYK).
The maximum transmission of colored light filters should
be located in the zone
corresponding to the minimum of the measured paint reflection.
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