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Conversion of Radj to KPSI ( Knot Per Square Inch )
Radj in Persian language, Farsi, is the total number on knots in 7 linear centimeters.
For example 50 Radj Persian Tabriz rugs, means a Persian Tabriz carpet which has
50 knots in seven centimeters in length. This table shows the conversion of Radj to
KPSI ( Knot Per Square Inch ).
Radj
KPSI
20
50
25
80
30
110
35
165
40
225
45
265
50
305
60
460
70
628