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'''Churna''' is a mixture ==Method of powdered herbs preparation==Raja and Kṣoda are the synonyms for cūrṇa. cūrṇas may be of plant origin, or mixed with other ingredients. The following points are to be noted. If metals / minerals are used in [[Ayurvedic medicine]]. [[Triphala]] is an example of a classic Ayurvedic formula, used for thousands prepare bhasma or sindura of years that is made from the powders of three fruits [[Amalaki (Emblica officinalis)]]minerals unless otherwise mentioned. In cases where pārada and gandhaka are mentioned, [[Haritaki (Terminalia chebula)]] prepare Kajjalī and add other drugs, one by one, according to the formula. In general the aromatic drugs like Hiṇgū [[Bibhitaki (Terminalia belerica)]Asafoetida]etc. should be fried before they are converted to fine powders.<ref name="AYURVEDIC PHARMACOPOEIA OF INDIA"/>

==General DescripitionCharacteristics==*Drugs according to the formulation composition of the particular churna cūrṇa are collected, dried, powdered individually and passed through sieve number 85 to prepare a fine powder. *They are mixed in the specified proportion and stored in well closed container. The term cūr´a may be applied to the powder prepared by a single drug or acombination of more drugs.==Preservation==*Raja Cūrṇas should be stored in air tight containers. Polyethylene and Kshoda are the synonyms foil packing also provides damp proof protection. Special precaution for churna. Churnas may storage should be taken in cases of plant origin, or mixed formulations with other ingredients. The following points are to be noted.*If metals / minerals are usedsalts, prepare bhasma or sindura of the minerals unless otherwise mentioned.*In cases where pārada sugars and gandhaka are mentioned, prepare Kajjalī and add other drugs, one by one, according to the formulaKsāras. <ref name="AYURVEDIC PHARMACOPOEIA OF INDIAThe Ayurvedic formulary of India"/>