SATRA STD 190 Instant lastometer
Simplified form of the STD 104. This device, intended for use as a simple pass/fail gauge, can be used in an incoming goods area for testing leather hides or sheet materials. Used in conjunction with the normal laboratory tests, this can provide a valuable quality control check, rejecting unsuitable materials before they enter the manufacturing cycle. The test is not destructive.
The instant lastometer is pneumatically operated via a pushbutton mounted on the frame and the user can select one of three preset distensions of 6, 7 or 8mm. When operated, the device clamps the material and pushes the ball-ended rod into the specimen. If the surface of the material cracks or tears, the material is unlikely to be suitable for lasting. The chosen pre-set distension value should be established by carrying out full laboratory tests.
A filtered and lubricated air supply is recommended for instant lastometers to prevent damage to the internal mechanisms.