Acid raisins
One of the Malayeri gardeners says:
After harvesting from the vineyards, raisins grapes are placed in clusters in baskets and then the baskets are placed in raisin acid solution
for three to four minutes.
Mr. Zandi continues:
This solution is composed of potassium carbonate, green oil and water,
and then the clusters are placed on sacks that have already been spread on the ground so that they do not collide with each other.
He adds:
The drying time of raisins in this method is three to four days, and finally,
after these raisins are ready, they are separated from the clusters.
The head of the Food, Cosmetics and Hygiene Supervision Unit of Malayer city states:
Potassium carbonate, by loosening and brittle the grape skin, causes the water in the grapes to evaporate faster and speeds up the drying process.
The supply and sale of foreign potassium bicarbonate powder that does not have a health import license is prohibited.