Density of a textile fiber is important to know. Density is measured by the following steps. Density gradient is prepared as the following:
- Clamp the density gradient glass in a firm vertical stand.
- Pour into the tube 25 ml of tetrachloroetylene.
- Now prepare mixture of xylene and tetrachloroetylene in descending order of percent tetrachloroetylene: 90/10, 80/20, 70/30, 60/40, 50/50, 40/60, 30/70, 20/80 and 10/90.
- Pour 25 ml of each in order carefully down the side of the gradient tube.
- Finally put 25 ml of xylene on top.
- Take short fragments of dyed reference fibers and tie in a knot snipping off loose ends.
- Boil for 2 minutes in xylene solvent to remove moisture and air.
- After about a half hour they should come to the rest in a level representing their density.
- Calibrate glass sphere may be used to determine the actual density at various levels.
- Prepare the unknown fiber in like manner, place in the gradient column and note at what level it floats.
So, that’s all about the density test. We can test the various types of fibers density as the above procedure.