were frozen in a 0 u00b0 c freezer after they were left therein for 4 days c n point of 0 u00b0 c or less table 1__________________________________________________________________________ example by weight liquid crystal compound 1 2 3__________________________________________________________________________first liquid crystal material 1 str9 7 7 3 9 1 2 str10 8 8 3 10 4 3 str11 7 7 3 9 1 4 str12 8 8 3 10 4 5 str13 7 7 3 9 1 6 str14 8 8 3 10 4 7 str15 5 5 2 6 5second liquid crystal material 8 str16 8 8 9 str17 7 710 str18 5 511 str19 5 512 str20 713 str21 814 str22 715 str23 3 516 str24 2 517 str25 5 5 518 str26 5 5 5third liquid crystal material19 str27 2 220 str28 3 321 str29 3 3__________________________________________________________________________ table 2__________________________________________________________________________ example by weight liquid crystal compound 4 5 6 7__________________________________________________________________________first liquid crystal material 1 str30 7 6 7 7 3 7 7 2 str31 8 7 7 8 3 8 8 3 str32 7 6 7 7 3 7 7 4 str33 8 7 7 8 3 8 8 5 str34 7 6 7 7 3 7 7 6 str35 8 7 7 8 3 8 8 7 str36 5 4 8 5 2 5 5second liquid crystal material 8 str37 8 8 5 9 str38 7 7 15 510 str39 5.