A-type durometer applies to general rubber, synthetic rubber, soft rubber,
poly-resin, leather, wax, etc.
C-type durometer applies to rubber and contains the tiny hole material
that that the vesicant is made in being used for plastic
D-type durometer applies to general hard rubber, hard resin, acryl, glass,
thermoplastics, printing plates, fibres, etc.
1.Overview
Shore durometer is used to test hardness of sulfureted rubber and
plastics, such instrument has A-type/D-type/C-type.
A-type and D-type apply to test the low and medium level hardness and
high level hardness of materials.
C-type applies to test the hardness of shoe-making porous materials
made by vesicants within plastics when the compression rate is 50% and
stress is beyond 0.049MPa.
2.Main parameters
Dial value:1-100 degree
Pointer journey:0-2.5mm
Stress at the end of pointer:0.55N-8.06N of A-type and C-type;0-44.5N of
D-type
3.Operation instructions
Put the sample on a solid plane,hold the durometer to make the pointer
at least 12mm away from the sample edge,and stably put the legs of
durometer on the sample.Thus the pointer straightly goes into the sample till
the legs completely get to the sample.Check the reading in 1s.Repeat shuch
test 5 times at different place which are at least 6mm away from the test
point and find the average reading(the distance between porous materials is
at least 15mm).
4.Notices
Check to make sure before test that figure indicates zero(if not indicates
zero,users may press “ ZERO” key).When press the durometer on the glass
plane,the figure should indicate 100 degree(the top of pointer an its legs
should tightly touch the glass).If it does not indicates ZERO or 100
degree,slightly press the pinter several times;if there is still error,it is
advisable to send it back to the manufacturer.
If it allows,rubber samples should be under the laboratory standard
temperature.If the test result of the sample by A-type durometer goes
beyond 90 degrees,it is advisable to use D-type durometer.When the test of
the sample by D-type durometer goes belw 20 degrees,it is advisable to use
A-type durometer.If the figure on A-type duorometer is below 10 degrees,it is
incorrect and can’t be used.When all the tests are over,users should clean
the gauge,put it back into the box and keep it in a dry place.
