Our standards are in accordance with the regulations of the Institute of Standards and Industrial Research of Iran (ISIRI). the institute defines standards for all kinds of Iranians pistachio products. the following table contains an abridged version of specifications for our six pistachio grades for all kind of natural in-shell pistachio nuts. (including raw, dried and roasted pistachios ):
|Grades||Superior Grade||Excellent Grade||Premiun Grade||Grade1||Grade2||Grade3|
|Shell Defects (WI (allowed tulle rances h4 %weight)|
|Closed shell and blanks||1||2||3||4||5||7-10|
|Deformity (Incl. opened from bottom)||1||2||3||5||6||7|
|Slightly open in-shell||5||10||18||25||N/A||N/A|
|Total shell defects||7||13||22||28||N/A||N/A|
|Kernel defects (%), (allowed tolerances by weight)|
|Obvious Pest Damage||1||2||3||3||3||4|
|Total kernel defects.||3||4||5||6||7||8|
|Other defects (%)(allowed tolerances by weight)|
|Foreign material excluding shells||0.2||0.2||0.25||0.25||0.3||0.3|
|Non-uniformaty of variety||1||2||3||4||5||7|
|Non-uniformity of size||1.5||1.6||1.8||2||2.4||5|
Maximum free water content allow for raw dried pistachios is 5% , with a 3% maximum for roasted pistachios.
Foreign material: glass, metal and live insects have been considered completely prohibited. Acceptable foreign material are pistachio-related like the hull, stems,shells and sand.
variety: Iranian pistachios have divided int two categories according to their shape : long pistachios with the ratio more than 1.52 and rounded pistachios with the ratio less than 1.52.
Non-uniformity of variety : the percentage of round pistachios in a sample of long pistachio or vice versa.
Non-uniformity of size: ratio of the total weight of the 10 largest nuts in a sample of 100 nuts to the weight of the smallest 10.